A Facile Method for the Preparation of 1,1-Dichloroolefins Using Benzenesulfonyl Chloride as a Chlorenium Ion Source

Kilsung Lee Department of Chemistry, Korea Advanced Institute of Science and Technology, P.O. Box 150 Cheongyang-Ni, Seoul, 130-650, Korea

Won Suk Shin Department of Chemistry, Korea Advanced Institute of Science and Technology, P.O. Box 150 Cheongyang-Ni, Seoul, 130-650, Korea

Dong Young Oh Department of Chemistry, Korea Advanced Institute of Science and Technology, P.O. Box 150 Cheongyang-Ni, Seoul, 130-650, Korea

Abstract

Reaction of the lithio anion derived from diethyl methylphosphonate with benzenesulfonyl chloride gives directly the (diethylphosphoryl)dichloromethyllithium. In situ reaction with aldehydes or ketones gives in high yields of 1,1-dichloroolefins in a convenient one-pot procedure.

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A Facile Method for the Preparation of 1,1-Dichloroolefins Using Benzenesulfonyl Chloride as a Chlorenium Ion Source

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A Facile Method for the Preparation of 1,1-Dichloroolefins Using Benzenesulfonyl Chloride as a Chlorenium Ion Source

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