Author Topic: Reduction of amides  (Read 2725 times)

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Vibrating_Lights

  • Guest
Reduction of amides
« on: February 06, 2003, 05:52:00 AM »
If one was to have some 4-acetoxyindol-3-yl-N,N-diethylglyoxylamide what besides LAH would remove the =O to give the dialykated tryptamine.  Would a Clemmenson Zn/HCl do the trick. Or is that to harsh for the indole.  Is it also possible to add the acetoxy with GAA instead of AAnhydride.
VL_


Rhodium

  • Guest
Ac2O is needed
« Reply #1 on: February 06, 2003, 09:19:00 AM »
Please do not open two threads about the synthesis of the same compound. But anyway, acetic acid is definitely not of any use to make the psilocin O-Acetyl ester.

Barium

  • Guest
Red-Al or, possibly, sodium ...
« Reply #2 on: February 06, 2003, 10:24:00 AM »
Red-Al or, possibly, sodium triacetoxyborohydride formed in situ from sodium borohydride and GAA.


Lilienthal

  • Guest
Sodium borohydride / acetic acid bears the...
« Reply #3 on: February 06, 2003, 10:56:00 AM »
Sodium borohydride / acetic acid bears the risk of reducing the indolic system to an indoline (2,3-doublebond hydrogenation).
As far as I know a Clemmenson reduction only reduces keto groups adjacent to aromatic rings, so if it  works, you would end up with the amide.