Synthesis 2006(24): 4131-4134  
DOI: 10.1055/s-2006-950353
PAPER
© Georg Thieme Verlag Stuttgart · New York

Sulfonyl Chloride Formation from Thiol Derivatives by N-Chlorosuccinimide Mediated Oxidation

Atsuko Nishiguchi*, Kazuhiro Maeda, Shokyo Miki
Chemical Development Laboratories, Takeda Pharmaceutical Company Limited, 2-17-85 Jusohonmachi, Yodogawa-ku, Osaka 532-8686, Japan
Fax: +81(6)63006251; e-Mail: Nishiguchi_Atsuko@takeda.co.jp;
Further Information

Publication History

Received 14 June 2006
Publication Date:
02 November 2006 (online)

Abstract

Oxidation of several thiol derivatives by a combination of N-chlorosuccinimide and dilute hydrochloric acid proceeded smoothly, affording the corresponding sulfonyl chlorides in good yield.

13

Oxidation of 3e with 5; the procedure was the same as the general procedure for NCS. This reaction required 2 equiv of 5.

14

Oxidation of 3e with 6; the procedure was the same as the general procedure for NCS. This reaction required 1.3 equiv of 6. The resulting solid was filtered off and washed with IPE (3.5 v/w to NCS) before work-up.

15

Depending on the substrate properties, e.g. solubility, reactivity may somewhat differ from these results. Especially for large-scale synthesis, appropriate hazardous safety evaluations should be undertaken.