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piperonylalcohol --> piperonal
Reagent: MnO2, molecular sieves; Solvent hexane;
Time 2h; Heating; Yield given
J.Chem.Res.Synop.; EN; 6; 1998; 308-309;
Hirano, Masao; Yakabe, Sigetaka; Chikamori, Hideki;
Clark, James H.; Morimito, Takashi
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piperonylalcohol --> piperonal
Reagent: MnO2 (CMD); Solvent CH2Cl2; Time 24h;
Ambient temperature; Yield 95%
Syn.Lett.; EN; 1; 1998; 35-36;
Journal; Aoyama, Toyohiko; Sonoda, Naoko; Yamauchi,
Mariko; Toriyama, Kyoko; Anzai, Masahiro; et al.
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piperonylalcohol --> piperonal
Solvent CH2Cl2; Time 3h; Yield: 96%
J.Chem.Soc.Dalton Trans.; EN; 1989; 901-906;
El-Hendawy, Ahmed M.; Griffith, William P.;
Taha, Fatma I.; Moussa, Mahmoud N.
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piperonylalcohol --> piperonal
Reagent H2O2; Catalyst: ligninase; Ambient temperature;
pH 3.0; Subject Studied; Product distribution
Phytochemistry; EN; 30; 1; 1991; 121-126;
Ageorges, Agnes; Pelter, Andrew; Ward, Robert S.
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demorol
(Hive Bee)
02-06-02 15:55
No 266091
Re: piperonylalcohol --> piperonal
I'm sure all these syntheses work, but the piperonylalcohol is not very easy to get.
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Life without chemistry would be a mistake.
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benzylchloride --> benzaldehyde
Reactant: hexamethylenetetramine
J.Chem.Soc.; 1949; 2704; Angyal et al.
C.R.Hebd.Seances Acad.Sci.; 157; 1913; 852; Sommelet
Patent DE 268786; Fabr. de Laire
Fortschr.Teerfarbenfabr.Verw.Industriezweige; DE; GE; 11; 197
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benzylchloride --> benzaldehyde
Reactant: aqueous Ca(NO3)2 solution
Zh.Prikl.Khim.(Leningrad); 3; 1930; 721, 725; Schorygin; Kisber; Ssmoljaninowa
Chem.Zentralbl.; GE; 101; II; 1930; 3397
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benzylchloride --> benzaldehyde
Reagent: diluted nitric acid or aqueous lead nitrate
Lauth; Grimaux; Bull.Soc.Chim.Fr.; <2> 7; 1867; 106
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benzylchloride --> benzaldehyde
Reagent: copper nitrate
Other Conditions: Reaktion ueber mehrere Stufen
Book Review / Secondary Ref.; Fischer,E.; Anleitung zur Darstellung
organischer Praeparate, 9. Aufl. , S. 41
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benzylchloride --> benzaldehyde
Reactant: potassium nitrite
anthracene; Temperature: 150 C
Chem.Ber.; 9; 1876; 1745; Brunner
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benzylchloride --> benzaldehyde
Reactant: nickel-powder, air ; Temperature: 160 C
Korczynski; Reinholz; Schmidt; ROCHAC; Rocz.Chem.; 9; 1929; 731,738
Chem.Zentralbl.; GE; 101; I; 1930; 2075
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benzylchloride --> benzaldehyde
Reagent: DMSO, NaHCO3
J.Org.Chem.; 24; 1959; 1792; Nace; Monagle
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benzylchloride + benzalchloride --> benzaldehyde
2 C5H5.CH2.Cl + C5H5.CH.Cl2 + 2 MnO2 --> 3 C6H5.CHO + 2 MnCL2 + H2O
Patent DE 20909, Schmidt
Fortschr.Teerfarbenfabr.Verw.Industriezweige; DE; GE; 1; 23
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hi, here are some refs again.
the first with MnO2/Microwaves is very nice.
the first sentence of the description of the procedure is:
" MnO2 'doped' silica ... "
that's music in my ears !
the article doesn't mention how the obtained benzaldehyde was further
treated, but with regard to the writingstyle, i could imagine that
they've done a microwave assisted Knoevenagel condensation and so on ...
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benzylalcohol --> benzaldehyde
Active Manganese Dioxide on Silica: Oxidation of Alcohols
under Solvent-free Conditions Using Microwaves
Abstract: Alcohols are rapidly and selectively oxidized to the
corresponding carbonyl compounds by silica supported active
manganese dioxide under solvent-free conditions using microwaves.
Tetrahedron Letters, Vol38, Issue 45, Nov-10-1997, 7823-7824;
Varma, Rajender S.; Saini, Rajesh K.; Dahiya, Rajender
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benzylalcohol --> benzaldehyde
silica gel supported ferric nitrate reagent
Solvent hexane; Time 4h; Other Conditions: Heating
Synth.Commun.; EN; 28; 2; 1998; 207-212;
Khadilkar, Bhushan; Borkar, Shobha
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benzylalcohol --> benzaldehyde
Chromat; Reagent MnO2/bentonite; Time 1 min; Temp 175C
Other Conditions: Irradiation; Yield 40%
Tetrahedron Lett.; FR; 34; 33; 1993; 5293-5294;
Martinez, Luis A.; Garcia, Olivia; Delgado, Francisco;
Alvarez, Cecilio; Patino, Rocio
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benzylalcohol --> benzaldehyde
Reagent HBr, H2O2; Solvent CH2Cl2; Time 4h; Temp 60C; Yield 84%
Bull.Soc.Chim.Fr.; EN; 4; 1988; 756; Dakka, Jihad; Sasson, Yoel
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benzylalcohol --> benzaldehyde
Reagent manganese dioxide, benzyl alcohol; Turnov;
Solvent hexane; Temp 20C; Yield 60%
J.Chem.Soc.Perkin Trans.1; EN; 7; 1990; 1937-1943
Cavaleiro, Jose A. S.; Neves, Maria G. P. S.;
Hewlins, Michael J. E.; Jackson, Anthony H.
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