Optically active pentacycles ( 13–18 ) were synthesized from L- and D-tryptophans, two of which ( 13 and 15 ) were alkylated and dehydrogenated to 21 and 22, respectively.
由L和D色氨酸合成了旋光性五环(13-18),其中两个(13和15)被烷基化并脱氢成21和22。
NAKAGAWA, MASAKO;FUKUSHIMA, HIROSHI;KAWATE, TOMOHIKO;HONGU, MITSUYA;UNE, +, CHEM. AND PHARM. BULL., 37,(1989) N, C. 23-32