Process of preparing optically active alpha-chlorocarboxylic est

Details Process of preparing optically active alpha-chlorocarboxylic est Process of preparing optically active alpha-chlorocarboxylic est

1993-12-03

1996-10-08

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549420, 549479, 560226, C07C 6963, C07D21363, C07D30758, C07D33502

Patent

active

055632742

ABSTRACT:
A process of preparing optically active alpha-chlorocarboxylic esters having the formula: ##STR1## from an optically active alpha-hydroxy carboxylic ester having the formula: ##STR2## in which process, an alpha-hydroxy carboxylate of formula II is brought into contact with phosgene and a compound chosen from amides, lactams and ureas, wherein R.sub.1 is an optionally substituted hydrocarbyl residue and R is preferably a methyl group.

REFERENCES:
Andrew Streitweser, Jr. and Clayton H. Heathcock, Introduction To Organic Chemistry, p. 69 (1976).
N. Irving Sax and Richard J. Lewis, Sr., Hawley's Condensed Chemical Dictionary, pp. 53, 100, 680, 898, 1148 and 1209. (1987).
Crosby et al., Chem. Abstracts, vol. 105, No. 13, Abst. No. 114,607-V, Sep. 29, 1986.

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