alanates intermediates, which were trapped with butyltellurenyl bromide (C4H9TeBr), furnishing exclusively the (E)-1-butyltelluro-1-tri(organyl)silyl-2-organyl-1-alkenes in 45–70% yields. These telluro(silyl)ketene acetals were utilized as substrates in Sonogashira cross-coupling Pd-catalyzed reactions, furnishing the (Z)-1,4-diorganyl-2-tri(organyl)silyl-1-buten-3-ynes with total control of regio- and stereochemistry
用D
IBAL-H silylacetylenes的铝氢化,随后加入的Ñ原位产生的(
正丁基锂Ž)-β-vinylorganosilane铝
氢化物中间体,其被捕获与butyltellurenyl
溴化物(C 4 H ^ 9 TeBr),家具完全(ë) -1-丁基telluro-1-三(有机基)甲
硅烷基-2-有机基-1-烯烃,产率为45-70%。这些
碲(甲
硅烷基)
乙烯酮缩醛被用作Sonogashira交叉偶联
钯催化的反应的底物,从而提供了(Z)-1,4-二有机基-2-三(有机基)甲
硅烷基-1-
丁烯-3-炔控制区域
化学和立体
化学的产率为62-80%。