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Paper | Regular issue | Vol 98, No. 11, 2019, pp.1525-1535
Published online, 14th November, 2019
DOI: 10.3987/COM-19-14171
Piperidine and Azetidine Formation by Direct Cyclization of Diols with N-Nonsubstituted Sulfonamide under the Mitsunobu Conditions Utilizing (Cyanomethylene)tributylphosphorane (CMBP) and Its Application to the Synthesis of Lupinine

Hiroto Kaku,* Yuhei Sonoda, Hideyuki Hishida, Yuri Taniguchi, Akiko Kubo, Takumi Hamaguchi, Mitsuyo Horikawa, Makoto Inai, Kei Kitamura, and Tetsuto Tsunoda*

*Pharmaceutical Sciences, Tokushima Bunri University, 180 Nishihamabouji, Yamashiro-machi, Tokushima, 770-8514, Japan

Abstract

(Cyanomethylene)tributylphosphorane (CMBP) can promote the Mitsunobu reaction of 1,3- and 1,5-diols with N-nonsubstituted sulfonamides, such as tosylamide (TsNH2) and 3,3-dimethoxypropylsulfonamide (DimpsNH2), to prepare azetidine and piperidine ring systems directly. Utilizing this methodology, lupinine, a biologically active piperidine alkaloid, was synthesized.