Y. Fukuda et al., NOVEL SYNTHESES OF OPTICALLY-ACTIVE CC-1065, U-73,975(ADOZELESIN), U-80,244(CARZELESIN), U-77,779(BIZELESIN), KW-2189, AND DU-861, Heterocycles, 45(12), 1997, pp. 2303-2308
The title syntheses were achieved by the method featuring oxidative cy
clization of the enamino esters [(S)-13 and (S)-24] derived from the 5
-aminoindoline [(S)-12], acylation with various structural types of in
dole-2-carboxylic acids, and formation of cyclopropapyrroloindole moie
ties.