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Paper | Special issue | Vol 33, No. 2, 1992, pp. 801 - 811
Published online:
DOI: 10.3987/COM-91-S86
A New Evidence for the Presence of a Spiroindolenium Species in the Pictet-Spengler Reaction

Tomohiko Kawate, Masako Nakagawa,* Koreharu Ogata, and Tohru Hino*

*Faculty of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

Abstract

The Pictet-Spengler reaction of the imine (9) with chloro (-)-diisopinocamphenylborane yielded optically active spiroindolines (14) and (15), providing a new evidence for the presence of a spiroindolenium intermediate.

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