REACTION OF 1-TRIMETHYLSILYLCYCLOPROPYLLITHIUM DERIVATIVES WITH DICHLORO-METHYL METHYL ETHER. A NOVEL SYNTHESIS OF CYCLOPROPYL SILYL KETONES
作者:Tadashi Nakajima、Masaru Tanabe、Katsuhiko Ohno、Masahito Segi、Sohei Suga
DOI:10.1246/cl.1986.177
日期:1986.2.5
Treatment of 1-trimethylsilylcyclopropyllithium derivatives with dichloromethyl methyl ether affords the corresponding newcyclopropylsilylketones in moderate yield. This reaction involves the intramolecular 1,2-silicon shift from carbon to carbon.
Treatment of cyclopropyl silyl ketones with trimethylsilyl trifluoromethanesulfonate as a strong acid having low nucleophilic counter anion gives the corresponding 5-silyl-2,3-dihydrofuran derivatives, exclusively, regardless of substituents on the cyclopropane ring or silicon atom. The resulting 5-silyl-2,3-dihydrofuran derivatives exhibit both reactivities of the vinylsilane and the cyclic enolether in the