Process for preparation of optically active sulfonamides and...

Details Process for preparation of optically active sulfonamides and... Process for preparation of optically active sulfonamides and...

2006-01-03

2006-01-03

Davis, Brian J. (Department: 1621)

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

Organic compounds

Carboxylic acid esters

C564S080000

Reexamination Certificate

active

06982344

ABSTRACT:
A method including resolution of a diastereomeric mixture represented by the formulawherein R1and R2are the same or different and each is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, only one of R1and R2contains one asymmetric carbon, and Rais an optically active and optionally substituted hydrocarbon group or an optically active and optionally substituted heterocyclic group, or a salt thereof, to produce the diastereomer having a steric configuration of the asymmetric carbon for R1or R2of an R configuration or an S configuration, or a salt thereof.

REFERENCES:
patent: 1063228 (2000-12-01), None
patent: 07-026194 (1995-01-01), None
patent: 11-147873 (1999-06-01), None
patent: WO 95/09151 (1995-04-01), None
Encyclopedia of Separation Technology, a Kirk-Othmer Encyclopedia (vols. 1 & 2), Douglas M. Ruthven, ed., John Willey & Sons, New York, 1997, table of contents and pp. 320-355 of volumn 1.
Kagaku Souetsu No. 4; pp. 242 (May 1974); Japanese language document and English Translation.
Kagaku Sousetsu No. 4 p. 242 (May 5, 1974).

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