Patent ID: 6271421
Filing Date: 2001-08-07
Classification: C07C,C07D

Abstract:
A selective mono-debromination process which comprises contacting an alpha-polybrominated ketone selected from a compound of Formula I and a compound of Formula II: ##STR11##with an alkali metal sulfite in the presence of a C.sub.2 -C.sub.6 alkylcarboxylic acid to obtain a selectively mono-debrominated product, wherein:Y is aryl or heteroaryl having at least one ring heteroatom selected from O and S;R.sup.1 is halo, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 haloalkyl, C.sub.1 -C.sub.6 alkoxy, nitro, cyano, SO.sub.2 R.sup.a, or CO.sub.2 R.sup.a ;R.sup.2 is hydrogen, bromo, or C.sub.1 -C.sub.6 alkyl;R.sup.a is C.sub.1 -C.sub.6 alkyl; andp and q are each independently integers from 0 to 4.