Potentially carcinogenic cyclopenta[a]phenanthrenes. Part VII. Ring-D diols and related compounds
作者:Maurice M. Coombs、Maureen Hall
DOI:10.1039/p19730001255
日期:——
17-dihydro-17-tosyloxy-15H-cyclopenta[a]phenanthrene and from its 15-tosyloxy-isomer in dimethyl sulphoxide at 100° gave, respectively, 15H- and 17H-cyclopenta[a]phenanthrenes whereas, contrary to a previous report, elimination from the former in boiling collidine led to a 1 : 1 mixture of the two olefins. Dehydrogenation of 16,17-dihydro-15H-cyclopenta[a]phenanthrene with DDQ also led to a mixture of the
在100°下于二甲基亚砜中从16,17-二氢-17-甲苯氧基-15 H-环戊基[ a ]菲和从其15-甲苯氧基异构体中消除,分别得到15 H-和17 H-环戊基[ a ]菲然而,与先前的报道相反,在沸腾的可力丁中从前者中消除导致两种烯烃的1:1混合物。16,17-二氢-15 H-环戊[ a ]菲与DDQ的脱氢也导致了15 H-和17 H-烯烃的混合物。从16,17-二氢-11-甲基-17-甲苯磺酰氧基-15 H-环戊[ a]消除沸腾可力丁中的]菲仅产生11-甲基-15 H-烯烃。用四氧化氧化这些烯烃得到顺式-二醇,而通过用硼氢化钠还原相应的16-羟基-17-酮得到反式-二醇。这些二醇的酸催化脱水反应导致未结合的16-酮。