Reductions, Reductive Alkylations, and Intramolecular Cyclizations of Acyl Silanes with Samarium Diiodide or Tributyltin Hydride
作者:Tsung-Hsun Chuang、Jim-Min Fang、Weir-Torn Jiaang、Yeun-Min Tsai
DOI:10.1021/jo951980m
日期:1996.1.1
bearing other substituents such as a bromine atom and alkenyl, succinimide, and carbonyl groups, were prepared, and their reactions with samarium diiodide or tributylstannane were studied. The reactions of acyl silanes occurred in various manners such as reductions, reductive alkylations, intramolecular radical cyclizations, pinacol couplings, aldol reactions, and Tishchenko reactions, depending on the nature
制备了包括脂肪族,芳香族和双酰基硅烷在内的一系列酰基硅烷,以及带有其他取代基(如溴原子和烯基,琥珀酰亚胺和羰基)的酰基硅烷,并使其与二碘化sa反应或三丁基锡烷进行了研究。取决于基材的性质和反应条件,酰基硅烷的反应以各种方式发生,例如还原,还原烷基化,分子内自由基环化,频哪醇偶联,醛醇缩合反应和季申科反应。通常将酰基硅烷还原而得到相应的α-甲硅烷基醇,而不转移甲硅烷基。实现了5-己烯丙基硅烷和1-silyl-1,5-pentanedione的分子内自由基环化反应,得到α-甲硅烷基环戊醇和1,2-环戊二醇衍生物,分别。在四氢呋喃中用二碘化sa处理时,在叔丁醇存在下,1-(三甲基甲硅烷基)-1,6-己二酮进行了频哪醇偶联反应,而在甲醇存在下进行了Tishchenko反应。1-甲硅烷基-1,5-戊二酮的Tishchenko反应得到δ-甲硅烷基-δ-内酯。用二碘化treating处理后,分别进行1-(三甲基甲硅烷基)-1