Reactions of pentafluorophenyltrimethylsilane and cyanomethyltrimethylsilane with carbonyl compounds catalyzed by cyanide anions
作者:B.A. Gostevskii、O.A. Kruglaya、A.I. Albanov、N.S. Vyazankin
DOI:10.1016/s0022-328x(00)81786-6
日期:1980.3
pentafluorophenyltrimethylsilane (I) and cyanomethyltrimethylsilane (II) with enolizable ketones in the presence of a catalytic amount of potassium cyanide-18-crown-6 complex gave the corresponding trimethylsilyl enol ethers. The same dehydrogenative silylation of acetylacetone and benzoylacetone with silane I was extended to the preparation of 2,4-bis(trimethylsiloxy)-1,3-pentadiene and 1-phenyl-1,3 -bis(trimethylsiloxy)-1
在催化量的氰化钾-18-冠-6配合物存在下,用可烯丙基化的酮处理五氟苯基三甲基硅烷(I)和氰基甲基三甲基硅烷(II),得到相应的三甲基甲硅烷基烯醇醚。乙酰丙酮和苯甲酰基丙酮与硅烷I的相同脱氢甲硅烷基化反应扩展到了2,4-双(三甲基甲硅烷氧基)-1,3-戊二烯和1-苯基-1,3-双(三甲基甲硅烷氧基)-1,3-丁二烯的制备, 分别。在相同条件下用二甲基双(五氟苯基)硅烷对乙酰丙酮和苯甲酰基丙酮进行脱氢甲硅烷基化反应,得到了新颖的杂环基5-亚甲基-2,6-二氧杂-1-硅酰基己烯-3-烯。在研究的反应中,硅烷的甲硅烷基化能力按Me 3 SiCN⋍Me 2 Si(CN)2的顺序增加<Me 3 SiCH 2 CN <Me 3 SiC 6 F 5> Me 2 Si(C 6 F 5)2。另一方面,氰化钾-18-冠-6配合物催化将硅烷I或II加成至不可烯化的化合物如苯甲醛,巴豆醛和甲基(三乙基锗基)乙烯酮的羰基上。