Cycloadditions of o-quinone dimethides with p-quinol derivatives: regiocontrolled formation of anthracyclic ring systems
作者:Junhua Wang、Liping H. Pettus、Thomas R.R. Pettus
DOI:10.1016/j.tetlet.2003.12.114
日期:2004.2
Regioselective cycloadditions between the cyclohexadienones 12–14 and the ortho-quinone dimethide 19, which is thermally generated from the corresponding 1,3-dihydro-1-methoxy-2,2-dioxide benzo[c]thiophene 27, are reported. The synthetic sequence provides rapid access to highly substituted anthracyclic system and may be of use for construction of the natural product (+)-rishirilide B.
的环己二烯酮之间的区域选择性环加成12 - 14和邻-quinone dimethide 19,其被热从相应的1,3-二氢-1-甲氧基-2,2-二氧苯并[生成Ç ]噻吩27被报告。合成序列可快速进入高度取代的碳环系统,并可用于构建天然产物(+)-利西立德B。