Preparation and some reactions of tricyclo[3.3.0.0]octan-2-ones and tricyclo[3.2.0.0]heptan-2-ones
作者:Ian C. Cotterill、Harry Finch、Rona M. Highcock、Robert A. Holt、Mary F. Mahon、Kieran C. Molloy、J. Gareth Morris、Stanley M. Roberts、Kevin M. Short、Vladimir Sik
DOI:10.1039/p19900001353
日期:——
corresponding 2-bromo derivatives (5)–(15) through a range of highly stereoselective reactions. From chosen compounds in the latter series, the tricyclo[3.3.0.0]octanones (16)–(22) were prepared. The tricycles (16) and (18) provided the bicyclo[3.3.0]octenones (23) and (24) respectively on treatment with acid or base. The reaction of the ketone (19) with nucleophiles (such as azide, fluoride, or iodide ion)
双环[4.2.0] oct-2-en-7-ones(1)–(4)通过一系列高度立体选择性反应提供相应的2-溴衍生物(5)–(15)。从后一个系列中选择的化合物中,制备了三环[3.3.0.0]辛酮(16)-(22)。三环(16)和(18)在用酸或碱处理时分别提供双环[3.3.0]辛烯酮(23)和(24)。酮(19)与亲核试剂(如叠氮化物,氟化物或碘化物离子)反应,得到合适的产物(27),(29)或(30)通过区域特异性同缀合物加成方法得到。氰化物离子以类似方式将二苯基三环烷酮(22)转化为氰基酮(32),但是这种应变的酮(22)以不同的方式与甲醇离子反应,生成甲酯(33)和(34)。用溴处理三环烷酮(19)和(22),得到1,4-二溴双环[3.3.0]辛烷-2-酮(38)和(39)。化合物(20)的结构通过X射线晶体学确认。2-溴二环庚烷-6-酮的脱氢溴化反应(43),(45)-(47),(49)和(50)给出了三环[3