Synthesis 2006(18): 3009-3014  
DOI: 10.1055/s-2006-942530
PAPER
© Georg Thieme Verlag Stuttgart · New York

Highly Efficient C-C Bond-Forming Reactions of an α-Cyanoketene Dithioacetal with Aldehydes and Ketones

Qian Zhang*, Yu Liu, Mang Wang, Qun Liu*, Jianglei Hu, Yanbing Yin
Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. of China
e-Mail: zhangq651@nenu.edu.cn;
Further Information

Publication History

Received 8 May 2006
Publication Date:
02 August 2006 (online)

Abstract

In the presence of titanium(IV) chloride, the C-C bond-forming reaction of the α-cyanoketene cyclic dithioacetal 1,3-dithiolan-2-ylideneacetonitrile with various aldehydes and ketones afforded multifunctional pentanedinitriles, 3-substituted- or 3,3-disubstituted 2,4-di-1,3-dithiolan-2-ylidenepentanedinitriles, respectively, in good to excellent yields under very mild conditions. A possible mechanism involving consecutive C-C bond formation was proposed.