Chiral (E,E)-1,4-dialkoxy-1,3-butadienes. 1. Stereoselective synthesis
作者:Marina Virgili、Albert Moyano、Miquel A. Pericàs、Antoni Riera
DOI:10.1016/s0040-4039(97)01622-5
日期:1997.9
A two step, totally stereoselective synthesis of (E,E)-1,4-dialkoxy-1,3-butadienes from chiral secondary alcohols has been developed. The key step involves the regio- and stereoselective hydrozirconation of alkoxyethynes derived from chiral alcohols; the intermediate (E)-(2-alkoxyvinyl)zirconium compounds, after treatment with cuprous chloride and thermally induced decomposition of the corresponding
已经开发了由手性仲醇进行的两步全立体选择性合成(E,E)-1,4-二烷氧基-1,3-丁二烯的方法。关键步骤涉及衍生自手性醇的烷氧基乙炔的区域和立体选择性加氢锆化反应。中间体(E)-(2-烷氧基乙烯基)锆化合物在用氯化亚铜处理并热诱导分解相应的(2-烷氧基乙烯基)铜后,以中等收率得到二烷氧基丁二烯,但具有完全的(E,E)非对映选择性。