Author Topic: 2009 Reference and Translation Requests  (Read 3039 times)

java

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Re: Reference request thread
« Reply #100 on: November 22, 2009, 01:41:57 PM »
Study of the microwave-assisted hydrolysis of nitriles and esters and the implementation of this system in rapid microwave-assisted Pd-catalyzed amination
Gitte Van Baelena and Bert U.W. Maes
Tetrahedron Volume 64, Issue 23, 2 June 2008, Pages 5604-5619


Abstract
Microwave-assisted hydrolysis of benzonitriles and methyl benzoates has been studied using a toluene/
concd aq KOH two phase system in the presence and absence of phase transfer catalyst. Conditions to
allow and avoid smooth hydrolysis could be identified. Based on the latter, the first microwave protocol
which allows the rapid Pd-catalyzed amination of aliphatic amines with chlorobenzenes containing
sensitive functional groups has been developed.
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java

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Re: Reference request thread
« Reply #101 on: November 22, 2009, 01:48:08 PM »
The Strecker Degradation of ?-Amino Acids.
Alexander. Schonberg, Radwan. Moubacher
Chem. Rev., 1952, 50 (2), pp 261–277


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java

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Re: Reference request thread
« Reply #102 on: November 22, 2009, 01:53:20 PM »
Thermolysis of Alkyl Sulfoxides and Derivatives:  A Comparison of Experiment and Theory 
Jerry W. Cubbage, Yushen Guo, Ryan D. McCulla, and William S. Jenks
J. Org. Chem. 2001, 66 (26), pp 8722–8736




Abstract
Gas-phase activation data were obtained for model sulfoxide elimination reactions. The activation enthalpy for methyl 3-phenylpropyl sulfoxide is 32.9 ± 0.9 kcal/mol. Elimination by methyl vinyl sulfoxide to form acetylene has an enthalpic barrier of 41.6 ± 0.8 kcal/mol and that of 3-phenylpropyl methanesulfinate to form hydrocinnamaldehyde is 34.6 ± 0.6 kcal/mol. Calculations at the MP2/6-311+G(3df,2p)//MP2/6-31G(d,p) level for simplified models of these reactions provide barriers of 32.3, 40.3, and 32.7 kcal/mol, respectively. A series of other compounds are examined computationally, and it is shown that the substituent effects on the sulfoxide elimination reaction are much more straightforward to interpret if ?H data are available in addition to the usually determined ?H. The activation enthalpy of the reverse addition reaction is also subject to structural variation and can usually be rationalized on the basis of nucleophilicity of the sulfur or polarity matching between the sulfenic acid and olefin derivative.
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java

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Re: Reference request thread
« Reply #103 on: November 22, 2009, 01:58:50 PM »
Basicity of saturated solutions of alkali metal hydroxides in dimethylsulfoxide
B. A. Trofimov1, A. M. Vasil''tsov1 and S. V. Amosova1
Russian Chemical BulletinVolume 35, Number 4 / April, 1986, pg.682-686




Conclusions
1.  Saturated solutions of alkali metal hydroxides in dimethyl sulfoxide are highly basic. The values of the acidity function H varied from 20.5 to 30.5 in going from LiOH to KOH.
2.  The strong dependence of the basicity of the alkali-DMSO system on the nature of the cation is the result of an ion pair interaction in the solution which increases with a decrease in the radius of the cation and the varied drying capacity of the alkalis present in excess.
3.  The KOH-DMSO pair is an example of the superbasic medium which is simplest to prepare and use; its basicity is located between potassium tert-butylate and potassium dimsyl in DMSO.


Comment by Requestee
This may confirm a long held belief that the condensation can possibly be performed thru the addition of KOH to a mixture of DMSO and Styrene using up the Dimsyl ion as it forms and pushing the reaction equilibrium to the right. If the concentration proves high enough then one would just have to thermaly decompose the post reaction fluid and steam distill the resulting Allylbenzene
« Last Edit: November 22, 2009, 02:00:26 PM by java »
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java

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Re: Reference request thread
« Reply #104 on: November 23, 2009, 03:45:42 AM »
Sodium Cyanoborohydride - A Highly Selective Reducing Agent for Organic Functional Groups
Clinton F. LANE
Synthesis 1975, 135.


Abstract
The utility of sodium cyanoborohydride as a selective reducing agent for organic synthesis is reviewed. Firstly a summary of the preparation and properties of sodium cyanoborohydride is given. Then some examples of sodium cyanoborohydride reductions of various systems are given including some applications of sodium cyanoborodeuteride. 1. Preparation 2. Purification 3. Physical Properties 4. Chemical Properties 4.1. Hydrolysis 4.2. Exchange 5. Selective Reducing Properties 5.1. Reduction of Aldehydes and Ketones 5.2. Reduction of Oximes 5.3. Reduction of Enamines 5.4. Reductive Amination of Aldehydes and Ketones 5.5. Reductive Alkylation of Amines and Hydrazines 5.6. Reductive Displacement of Halides and Tosylates 5.7. Deoxygenation of Aldehydes and Ketones





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java

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Re: Reference request thread
« Reply #105 on: November 23, 2009, 02:06:13 PM »
One-pot conversion of thebaine to hydrocodone and synthesis of neopinone ketal.
Robert J Carroll, Hannes Leisch, Lena Rochon, Tomas Hudlicky and D Phillip Cox
The Journal of Organic Chemistry 74(2):747-52 (2009)


Abstract
The ethylene glycol ketal of neopinone was prepared in a one-pot procedure by the reaction of thebaine with ethylene glyocol in the presence of p-toluenesulfonic acid. The ketal is also an intermediate in the conversion of thebaine to hydrocodone with ethylene glycol and Pd(OAc)(2), followed by hydrogenation. Additionally, a one-pot procedure for the conversion of thebaine to hydrocodone was achieved by employing palladium catalysis in aqueous medium. Palladium serves a dual purpose in this transformation, first for the activation of the dienol ether of thebaine and second as a hydrogenation catalyst. This procedure was found to be comparable to the two-step protocol which employs diimide reduction of thebaine followed by acid-catalyzed hydrolysis of the resulting 8,14-dihydrothebaine to hydrocodone. Experimental and spectral data are provided for all compounds.

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java

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Re: Reference request thread
« Reply #106 on: November 24, 2009, 04:36:36 AM »

High Temperature Proton Exchange Reactions by Hydroxide In Water 
Dean A. Smith a; Donald R. Dlmmel
Journal of Wood Chemistry and Technology Volume 4, Issue 1 March 1984 , pages 75 - 90


Abstract
The ability of hydroxide Ion to produce carbanlons at 170°C In water has been determined by measuring the extent of deuteratlon and reexchange of deuterium labels for several organic acids and phenols. The results of the exchange reactions provide a rough estimate of the types of reactions that are possible between hydroxide Ion and wood components during alkaline pulping. It has been estimated that NaOH/H20 at 170° can deprotonate organic acids having pKa values of about 35 and can produce polyanlon intermediates. Several experiments were directed toward understanding the effects of ct-hydroxyl groups and zinc ions on carbanion formation. Exchange reactions involving Na2S at 170° showed that this species is largely dissociated to NaOH and NaSH and that the latter does not contribute to the basicity of the solution.
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java

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Re: Reference request thread
« Reply #107 on: November 24, 2009, 12:47:38 PM »
HYDROXY- AND DIHYDROXYPHENYLETHYLMETHYLAMINES AND THEIR ETHERS
Johannes S. Buck
J. Am. Chem. Soc. 1932, 54 (9), pp 3661–3665
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Sedit

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Re: Reference request thread
« Reply #108 on: November 24, 2009, 02:09:39 PM »
ELECTROLYTIC CONDENSATION OF CARBOXYLIC ACIDS
G E Svadkovskaya et al
Russ. Chem. Rev. 29 161-180, 1960

doi: 10.1070/RC1960v029n03ABEH001225  
  

G E Svadkovskaya and S A VoitkevichCONTENTS
I. Introduction 161
II. Effect of experimental conditions on the course of the Kolbe synthesis 162
III. Electrolytic condensation in non-aqueous solvents 163
IV. Effect of the structure of acids on the course of the Kolbe synthesis 163
V. "Crossed" electrolytic condensation 171
VI. Mechanism of the Kolbe reaction 174

« Last Edit: November 24, 2009, 09:09:15 PM by Enkidu »
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java

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Re: Reference request thread
« Reply #109 on: November 24, 2009, 07:55:58 PM »

Ueber die Hofmann'sche Reaction (Ueberführung der Amide in Amine)
C. Graebe, S. Rostovzeff
Berichte der deutschen chemischen Gesellschaft, Vol 35(3), Pages 2747-, 1902



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java

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Re: Reference request thread
« Reply #110 on: November 27, 2009, 03:49:04 PM »
Electrochemical synthesis of L-histidinol using solvated electrons
BELTRA A. P. ; BONETE P. ; GONZALEZ-GARCIA J. ; GARCIA-GARCIA V. ; MONTIEL V. ;
Journal of the Electrochemical Society (2005), 152(4), pp.65-68



Abstract
The feasibility of the preparation of L-histidinol (I) by reduction of L-histidine methyl ester (II) using an electrogenerated solvated electrons solution has been studied in a laboratory scale reactor. The solvated electrons solution was obtained by electrolysis of a solution of LiCI in EtNH2 that permits an easier handling than NH3or MeNH3. All components of the electrochemical setup have been optimized for the reaction conditions used. The influence of some reaction variables on the yield of (I) has been studied. Thus, increasing current intensity and temperature enhances the yield of L-histidinol. Nevertheless, the volatility of ethylamine limits the increase of the intensity current and the temperature. A fractionated feeding procedure of (II) was shown to be desirable. The work-up and isolation procedure of (I) has also been described. It includes an electrodialysis process that makes easier the isolation of (I), as well as the recovered LiCl could be recycled as supporting electrolyte.

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java

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Re: Reference request thread
« Reply #111 on: November 27, 2009, 05:52:14 PM »
The Reduction of Organic Compounds by Solvated Electrons Generated Electrochemically
Ninel M Alpatova, S E Zabusova and Andrei P Tomilov;
Russ. Chem. Rev. 55, 99-112, 1986  



Abstract
 The present review deals with the reduction of organic compounds by solvated electrons generated at a cathode. The general conditions necessary for the electrochemical production of solvated electrons, and the systems in which this process is possible, have been examined. The characteristic features of the reactions of organic compounds with solvated electrons compared with other methods of reduction have been discussed. Specific data on the reduction by solvated electrons of individual classes of substances difficult to reduce, aromatic and unsaturated compounds, ketones, and derivatives of carboxylic acids — amides, nitriles, and esters — have been examined. The review will be useful for specialists in the physical chemistry of solvated electrons, theoretical electrochemistry, the electrochemistry of organic compounds, and organic synthesis.
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no1uno

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Re: Reference request thread
« Reply #112 on: November 28, 2009, 11:21:15 AM »
Preparation of Optically Active Ketones

Rapoport, et al

United States Patent 4,618,710

Quote
Abstract

An optically active alpha-amino acid derivative having the formula (diagram omitted for clarity) wherein: X is OH, Cl, Br, I or OCOR3;
Y is a radical selected to stabilize the alpha carbon atom of the alpha-amino acid derivative sufficiently to prevent significant change in symmetry thereof during replacement of X with an alkyl, aryl, alkenyl, alkynyl, alkaryl, aralkyl, alkenaryl or alkynaryl radical, or such radical having one or more chemical substituents thereon; and
R1 and R2 are different from one another and are each hydrogen or an alkyl, aryl, alkenyl, alkynyl, alkaryl, aralkyl, alkenaryl or alkynaryl radical, or such radical having one or more non-protic chemical substituents thereon is conventionally synthesized from the corresponding alpha-amino acids. The portion (the diagram shows the carboxylic-X bond) is converted to a ketone functionality without racemization
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madprossor

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Re: Reference request thread
« Reply #113 on: November 28, 2009, 03:59:57 PM »
CuO and Ag2O/CuO Catalyzed Oxidation of Aldehydes to the Corresponding Carboxylic Acids by Molecular Oxygen
Qingyong Tian, Daxin Shi and Yaowu Sha
Molecules 2008, 13, 948-957


Comments by poster

I'm also open to suggestions on oxidizing an aldehyde to the carboxylic acid.  I didn't ask for any references utilizing Ruthenium, TEMPO, or OxyNitrox S100.   If anyone knows whether these have an advantage over the other methods which justifies the additional effort in acquisition then let me know.  I'm leaning away from sodium chlorite, also.

"oxygen blown into the flask" means to suppy oxygen at atmospheric pressure, right?  it looks good except that 80% yields are a little weak.
« Last Edit: November 30, 2009, 03:56:33 PM by java »

java

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Re: Reference request thread
« Reply #114 on: November 29, 2009, 01:41:42 PM »


THE PREPARATION OF ALIPHATIC AMIDES
James A. Mitchell, E. Emmet. Reid
J. Am. Chem. Soc., 1931, 53 (5), pp 1879–1883


Abstract
The most satisfactory methods of preparing amides have involved dehydration of the ammonium salt of the corresponding acid. Hofmann prepared various amides by heating ammonium salts of aliphatic acids for five or six hours at 230" under pressure. Kundig prepared acetamide by the rapid distillation of ammonium acetate and by heating an alcoholic solution of acetic acid and ammonia in a sealed tube for a long time at 100'C. He also obtained a yield of amide greater than 25% by passing dry ammonia through acetic acid and then heating to boiling. Grant and James have prepared amides by saturating the acid with dry ammonia and boiling. Dulap, Keller and Verley have modified the procedure by heating sodium acetate and ammonium chloride at 240'C.

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Stereospecific radioimmunoassays for d-pseudoephedrine in human plasma and their application to bioequivalency studies
John W. A. Findlay, James T. Warren, John A. Hill, Richard M. Welch
Journal of Pharmaceutical Sciences, Vol 70(6), pp.624-631



Abstract
Antiserum to d-pseudoephedrine was raised in New Zealand White rabbits in response to immunization with a conjugate of bovine serum albumin and d-pseudoephedrine-N-3-propionic acid. The hapten was prepared by reaction of methyl acrylate with d-pseudoephedrine, followed by ester hydrolysis. Sodium boro[3H]hydride reduction of dl-ephedrone gave [-3H]-dl-ephedrine, and a Welsh rearrangement with acetic anhydride followed by deacetylation gave [-3H]-dl-pseudoephedrine, which was used as a radioligand in radioimmunoassay procedures for direct plasma analyses. Three sensitive radioimmunoassay procedures were developed, two using [3H]pseudoephedrine as the radioligand and either adsorption on coated charcoal or polyethylene glycol precipitation for separation of antibody-bound from free radioligand. The third method used an [125I]tyrosine methyl ester analog of pseudo-ephedrine and charcoal separation, preceded by extraction and derivatization of pseudoephedrine with methyl acrylate. All three assays could detect 2.5 ng of pseudoephedrine/ml. The antiserum was stereospecific, showing low cross-reactivities with l-pseudoephedrine and d-and l-ephedrines. d-Norpseudoephedrine and some other related compounds also had low cross-reactivity in these radioimmunoassay procedures. Excellent agreement was found between pseudoephedrine concentrations in human plasma determined by radioimmunoassay and by a standard GLC method. The utility of radioimmunoassay was illustrated by application of one of these procedures to an assessment of the bioequivalence of immediate- and sustained-release pseudoephedrine formulations in normal volunteers. A sustained-release preparation containing 120 mg of pseudoephedrine hydrochloride given every 12 hr was shown by AUC comparisons to be bioequivalent to an immediate-release tablet (containing 60 mg of pseudoephedrine hydrochloride) given every 6 hr.



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alpha.-Amino acids as chiral educts for asymmetric products. Amino acylation with N-acylamino acids
Thomas F. Buckley III, Henry Rapoport
J. Am. Chem. Soc. 1981, 103 (20), pp 6157–6163


Abstract
a-N-Acylamino acids have been developed as useful reagents for the preparation of optically pure a-aminoalkyl aryl ketones. Protection of the amino group as either the ethoxycarbonyl or benzenesulfonyl derivative allows alanine to serve as an effective educt for the chirally specific synthesis of a variety of structures containing the phenylethylamine backbone. Benzene undergoes Friedel-Crafts acylation with the N-acylalanine acid chloride. Catalyst complexation with oxygenated aromatics, however, prohibits acylation of aryl ethers. An arylmetallo reaction scheme overcomes this problem and also affords regiospecificity not attainable in conventional acylations. As examples, optically pure ephedrines and amphetamines were directly synthesized without recourse to resolution since the chirality of the amino acid educt was entirely conserved throughout the process.
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java

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Re: Reference request thread
« Reply #115 on: November 29, 2009, 02:23:30 PM »

An Efficient and Practical System for the Catalytic Oxidation of Alcohols, Aldehydes, and ?,?-Unsaturated Carboxylic Acids
Joseph M. Grill, James W. Ogle, and Stephen A. Miller
J. Org. Chem., 2006, 71 (25), pp 9291–9296

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Hydrogen peroxide oxidation of aldehydes to carboxylic acids: an organic solvent-, halide- and metal-free procedure
Kazuhiko Sato, Mamoru Hyodo, Junko Takagi, Masao Aoki and Ryoji Noyori
Tetrahedron Letters, Volume 41, Issue 9, 26 February 2000, Pages 1439-1442

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Furan reactions. IV. Furoic acid from furfural.
Hurd, C.D.; Garrett, J.W.; Osborne, E.N.
J. Am. Chem. Soc. 1933, 55, 1082-1084
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java

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Re: Reference request thread
« Reply #116 on: November 29, 2009, 02:32:36 PM »
Facile Oxidation of Aldehydes to Acids and Esters with Oxone
B. R. Travis, M. Sivakumar, G. O. Hollist, B. Borhan,
Org. Lett. 2003, 5, 1031-1034.
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java

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Re: Reference request thread
« Reply #117 on: November 29, 2009, 03:41:16 PM »
Selective and Efficient Oxidation of Aldehydes to Their Corresponding Carboxylic Acids Using H2O2/HCl in the Presence of Hydroxylamine Hydrochloride
Kiumars BAHRAMI *, Mohammad Mehdi KHODAEI, Shahab KAMALI
Chinese Journal of Chemistry 2008, Volume 26 Issue 6, Pages 1119 - 1121

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Baba_McKensey

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Re: Reference request thread
« Reply #118 on: November 29, 2009, 04:30:45 PM »
You can find articles on the Hofmann reaction by searching "Hofmann" here http://jchemed.chem.wisc.edu/

java

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Re: Reference request thread
« Reply #119 on: November 29, 2009, 04:49:16 PM »
Selective and Efficient Oxidation of Aldehydes to Their Corresponding Carboxylic Acids Using H2O2/HCl in the Presence of Hydroxylamine Hydrochloride
BAHRAMI, Kiumars* KHODAEI, Mohammad Mehdi* KAMALI, Shahab
Chinese Journal of Chemistry 2008, Volume 26 Issue 6, Pages 1119 - 1121

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Palladium(II)-catalyzed Selective Oxidation of ?,?-Unsaturated Aldehydes to ?,?-Unsaturated Carboxylic Acids with Hydrogen Peroxide
Yoshihiro Kon, Daisuke Imao, Takuya Nakashima and Kazuhiko Sato
Journal Chemistry Letters 2009, Volume 38 Number 5, Page 430
 

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Complementary enantioselective approaches to the quinolizidine alkaloids lupinine and epilupinine by enolate Claisen rearrangements or direct allylation of piperidin-2-ylacetic acid derivatives
Christopher Morley, David W. Knight, Andrew C. Share
J. Chem. Soc., Perkin Trans. 1, 1994, (20),2903-2907

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Preparation of Carboxylic Acids from Aldehydes (Including Hydroxylated Benzaldehydes) by Oxidation with Chlorite
Lindgren, Bengt O.; Nilsson, Torsten
Acta Chem. Scand. 27 (1973) 888


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The oxidation of aldehydes to acids with calcium hypochlorite [Ca(OCl)2]
Stephen O. Nwaukwa and Philip M. Keehn
Tetrahedron Letters Volume 23, Issue 31, 1982, Pages 3131-3134



..............let's see what you give back, as contribution to the forum as information,  for the effort of aquireing this references......java
« Last Edit: November 30, 2009, 12:27:48 AM by java »
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