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Paper | Special issue | Vol 95, No. 1, 2017, pp.314-321
Published online, 26th October, 2016
DOI: 10.3987/COM-16-S(S)22
Phosphine-Promoted Migrative Cyclization of Sulfonylalkynol and Sulfonylalkynamide for the Synthesis of Oxa- and Azacycles

Yinli Wang, Raphaël Oriez, Shougun Ou, Yasunori Miyakawa, Yousuke Yamaoka, Kiyosei Takasu, and Ken-ichi Yamada*

*Graduate School of Pharmaceutical Sciences, Tokushima University, 1-78-1 Shomachi, Tokushima 770-8505, Japan


A catalytic amount of phosphine or DMAP promoted the migrative cyclization of propargyl sulfones bearing an internal nucleophilic functionality in a γ-umpolung manner.