作者:Da Chuan Zhao、Annette D. Allen、Thomas T. Tidwell
DOI:10.1021/ja00075a027
日期:1993.11
2,3-Bis(trimethylsilyl)-1,3-butadiene-1,4-dione (1) is formed as the only product on thermolysis of 3,4-bis-(trimethylsilyl)cyclobut-3-ene-1,2-dione (2), and the rate of ring opening of 2 is comparable to that of substituted cyclobutenes and cyclobutenones. Photolysis of 2 also forms 1, which reacts with ethanol in a stepwise fashion with faster addition of one ethanol molecule to give an isolable
2,3-Bis(trimethylsilyl)-1,3-butadiene-1,4-dione (1) 是 3,4-bis-(trimethylsilyl)cyclobut-3-ene-1,2 热解的唯一产物-二酮(2),2的开环速率与取代环丁烯和环丁烯酮的开环速率相当。2 的光解也形成 1,它以逐步方式与乙醇反应,更快地加入一个乙醇分子,得到可分离的单烯酮 18,其在更慢的步骤中反应得到琥珀酸二酯,并伴随脱甲硅烷基化。2,3-双(叔丁基二甲基甲硅烷基)-1,3-丁二烯-1,4-二酮 (3),类似于 1 制备,同样加入一分子甲醇得到可分离的单烯酮 20,然后反应得到二甲基2,3-双(叔丁基二甲基甲硅烷基)琥珀酸酯(21)为主要产品