作者:I.H.M. Wallace、T.H. Chan
DOI:10.1016/s0040-4020(01)88582-3
日期:1983.1
1, 5-Bis(trimethylsiloxy)-1, 5-dimethoxy-1, 4-pentadienes (7) can be prepared in good yield by silylation of the dianions of dimethyl glutarates (8). On treatment with titanium tetrachloride, 7 cyclise stereoselectively to dimethyl trans-cyclopropane-1, 2-dicarboxylates 10. Reaction of 7 with acetic anhydrode and titanium tetrachloride gives substituted cyclobutanes 22b–d.
通过将戊二酸二甲酯(8)的二价硅烷基化,可以高收率制备1,5-双(三甲基甲硅烷氧基)-1、5-二甲氧基-1、4-戊二烯(7)。在用四氯化钛处理时,7环化立体选择性地二甲基反式-环丙烷-1,2-二羧酸盐10。7与乙酸酐和四氯化钛反应生成取代的环丁烷22b–d。