Preparation of α- or β-trifluoromethylated vinylstannanes and their cross-coupling reactions
作者:In Howa Jeong、Young Sam Park、Myong Sang Kim、Yong Sup Song
DOI:10.1016/s0022-1139(02)00329-9
日期:2003.4
α- or β-Trifluoromethylated vinylstannanes 1, 2a, 3 and 4 were prepared form 1,1-bis(phenylthio)-2,2,3,3,3-pentafluoropropylbenzene (5) via several steps. The cross-coupling arylation reactions of 1–4 with aryl iodides bearing a bromo, methoxy, methyl, nitro or trifluoromethyl group on para- or meta-position of benzene ring afforded the corresponding coupling products in good yields. Compounds 1, 2a
α-或β-三氟甲基化乙烯基锡烷1,图2a,3和4分别制备形式1,1-双(苯硫基)-2,2,3,3,3- pentafluoropropylbenzene(5通过若干步骤)。的交叉耦合反应芳基化1 - 4与轴承溴,甲氧基,甲基,硝基或三氟甲基上,得到相应的偶联产物以良好的收率苯环的对位或间位的芳基碘化物。化合物1,图2a和4用各种类型的酰氯进行酰化反应,以高收率得到相应的三氟甲基化的烯酮衍生物。用LiAlH 4还原三氟甲基化的烯酮衍生物,然后用AlCl 3进行Fridel-Craft's型环化,可提供高收率的三氟甲基化的茚衍生物。