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Communication | Regular issue | Vol 45, No. 12, 1997, pp.2303-2308
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7920
Novel Syntheses of Optically Active CC-1065, U-73,975(Adozelesin), U-80,244(Carzelesin), U-77,779 (Bizelesin), KW-2189, and DU-86

Yasumichi Fukuda,* Hirosuke Furuta, Futoshi Shiga, Yoshikazu Asahina, and Shiro Terashima*

*Central Research Laboratories, Kyorin Pharmaceutical Co. Ltd., Mitarai, Nogi, Tochigi 329-0114, Japan

Abstract

The title syntheses were achieved by the method featuring oxidative cyclization of the enamino esters [(S)-13 and (S)-24] derived from the 5-aminoindoline [(S)-12], acylation with various structural types of indole-2-carboxylic acids, and formation of cyclopropapyrroloindole moieties.