multisubstituted 1,3‐dienes by α‐exclusive alkylidenation of crotonic derivatives has been developed. This protocol, mediated by titanium tetrachloride chelation, features excellent regio‐ and stereoselectivity, mild reaction conditions, easy operation and wide substrate scope. Conversions of the derived dienes to other useful molecules were also explored.
已经开发了通过
巴豆衍
生物的α排他性烷基化直接获得多取代的1,3二烯的方法。该方案由
四氯化钛螯合介导,具有出色的区域和立体选择性,温和的反应条件,易于操作和广泛的底物范围。还研究了衍生的二烯向其他有用分子的转化。