Synthesis of ethylidene bis-formamide using formic acid

Details Synthesis of ethylidene bis-formamide using formic acid Synthesis of ethylidene bis-formamide using formic acid

1988-10-19

1990-03-06

Sutto, Anton H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C 6720

Patent

active

049067770

ABSTRACT:
Ethylidene bis-formamide, a precursor for the monomer N-vinylformamide, is made in high yield by heating together formamide and acetaldehyde in a mol ratio of at least 3:1 and in a reaction mixture which is at least 20 weight percent formic acid. In a preferred procedure the acetaldehyde is added after the formamide has been preheated and formic acid is present. Yields of ethylidene bis-formamide of over 50%, based on the acetaldehyde, are obtained in relatively short reaction times, before loss of substantial amounts of recoverable formamide through hydrolysis.

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