Patent Number: 6,251,350

Title: Process for the manufacture of thiophosphoryl chloride

Abstract: The present invention relates to an improved process for the preparation of thiophosphoryl chloride which is useful as an intermediate for the synthesis of insecticidally active compounds. The improvement comprises the presence in the reaction mixture of a catalytic amount of a nitroxide free radical of the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent an alkyl group.

Inventors: Applegate; Jacqueline M. (Leverkusen-Steinbuchel, DE), Newallis; Peter E. (Leawood, KS), Prasad; Vidyanatha A. (Leawood, KS)

Assignee: Bayer Corporation

International Classification: C01B 25/00 (20060101); C01B 25/10 (20060101); C01B 025/10 ()

Expiration Date: 06/26/2018