Process for synthesizing N-(mercaptoacyl) amino acid...

Details Process for synthesizing N-(mercaptoacyl) amino acid... Process for synthesizing N-(mercaptoacyl) amino acid...

2001-11-09

2004-12-28

Desai, Rita (Department: 1625)

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

Organic compounds

Carboxylic acids and salts thereof

C562S448000, C564S162000

Reexamination Certificate

active

06835851

ABSTRACT:

The instant invention is connected with an industrial process for preparing N-(mercaptoacyl) amino acid derivatives from &agr;-substituted acrylic acids.
The invention relates more particularly to a novel process for synthesizing N-(mercaptoacyl) amino acid derivatives of general formula (I):
wherein
R1 represents:
a phenyl group; or
a 3,4-methylenedioxyphenyl group
R2 represents a hydrogen atom or a lower alkyl group;
R3 represents a hydrogen atom, a lower alkyl group or a lower phenylalkylene group; and
R4 represents a linear or branched aliphatic acyl radical or an aromatic acyl radical.


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