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Benzaldehyde+nitroethane rxn
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nzbee

Joined: 17 Mar 2005
Posts: 4
121.78 Points
View Single Post3225
Benzaldehyde+nitroethane rxn

 Mon Apr 11, 2005 2:09 pm		 Reply with quote
Hi,

Was wondering if anyone has done this and has a proper write up on it. Swim kinda needs to know exactly what equipment and chems are needed and how to carry out the rxn. Any help is much appreciated.
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Rumpelstilskin

Joined: 11 Apr 2005
Posts: 2
57.72 Points
View Single Post3232
Benzaldehyde+Nitroethane

 Mon Apr 11, 2005 6:19 pm		 Reply with quote
Dude, RU trying to make Stims or Phenethylamines. You'll end up with ------------ with that reaction.

Wrong place to post this no?
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Star-light
Blacklight bulb
Joined: 26 Mar 2005
Posts: 77
2681.50 Points
View Single Post3242
Re: Benzaldehyde+Nitroethane

 Mon Apr 11, 2005 11:11 pm		 Reply with quote
Rumpelstilskin wrote:
Dude, RU trying to make Stims or Phenethylamines. You'll end up with ------------ with that reaction.

Wrong place to post this no?


I think this is indeed the wrong place (although ----------- is of course alpha-methyl phenethylamine).

As to the reaction details, here is one way of doing it:

Preparing Methylamine Acetate in IPA
2.63g (40mmol) 85% KOH was dissolved in 50ml Hot IPA. To this was added 2.3ml GAA. 2.72g (40mmol) of MeAm.HCL (40mmol) was dissolved in 60ml Hot IPA. The two hot solutions were mixed in a cold flask and allowed to cool. A voluminous precipitate of KCL formed that was vacuum filtered off.

Preparing Phenyl-2-Nitropropene
55ml of the methylamine acetate in IPA solution made above was put in a 250ml erlenmeyer flask with 10.6g (100mmol) Benzaldehyde and 8.25g (110mmol) Nitroethane. A condenser was attached to the flask and the stirred mixture was heated on a waterbath at 45C for 3 hours.

The flask was removed from the waterbath, stoppered and allowed to cool. A crop of yellow crystals formed. The flask was put in the freezer to ensure maximum crystallization, and then the crystals were vacuum filtered off. The crystals were then recrystallized from IPA. The yield I cannot remember I'm afraid but it is pretty good.
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nzbee

Joined: 17 Mar 2005
Posts: 4
121.78 Points
View Single Post3249

 Tue Apr 12, 2005 1:11 am		 Reply with quote
Sorry guys was wanting to make ----. Thanks for the help and sorry for not posting in the right area.
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icecool
Insistent Chemist
Joined: 16 Feb 2005
Posts: 268
8466.84 Points
View Single Post3253

 Tue Apr 12, 2005 2:58 am		 Reply with quote
https://synthetikal.com/synthforum/viewtopic.php?t=492

Here is a lot of info about the thing you asked about.
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IndoleAmine
Dreamreader Deluxe
Joined: 09 Feb 2005
Posts: 681
Location: Bahamas
18717.10 Points
View Single Post3254

 Tue Apr 12, 2005 3:04 am		 Reply with quote
Since many compounds described in PiHKAL are alpha-methylphenethylamines, this thread wasn't really posted in the wrong forum - considering how many times the compound nitroethane is used in the preparations contained in this book... Idea

(anyway, since you all spoke it out that clearly, we all know nowe that in his specific case, nzbee indeed should have posted here right away... But next time: shhh!! Very Happy )

cheers


i_a
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