From: Robert Ribau Dalama (robert.ribau$##$yahoo.es)
Date: Sun Apr 02 2006 - 14:32:42 EDT
Hi,
I'm trying to reduce ethyl-(hydroxyimino)cyanoacetate,
CAS[3849-21-6], to ethyl amino (cyano)acetate using
sodium dithionite.
Most of the papers using this method perform this
reaction in basic conditions (water, NaHCO3),
dissolving the starting material, adding the reducing
agent and then extracting with either dichloromethane
or ethyl acetate.
To my surprise, I can't reproduce it.
There is no starting material left but I can't find
the desired product either, neither in the organic
phase nor in the water phase. Actually I can't find
any product at all that could account for
overreduction.
I would appreciate any suggestions on this problem.
By the way, hydrogenation works but I'd still like to
use my cheap dithionite.
Robert
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