Stereoselective Synthesis of Dienes from N-Allylhydrazones
摘要:
A new method for the stereoselective synthesis of dienes from aldehydes and N-allylhydrazine derivatives has been developed. High levels of (E)-stereoselectivity are obtained for a variety of substrates. Addition of a dienophile to the reaction mixture allows a one-flask diene synthesis-cycloaddition sequence.
Tandem Carbon−Carbon and Carbon−Chlorine Bond Formation by Cu(II) Chloride-Promoted [3,3] Sigmatropic Rearrangement of <i>N</i>-Allylhydrazones
作者:Devon A. Mundal、Jennifer J. Lee、Regan J. Thomson
DOI:10.1021/ja7101967
日期:2008.1.30
chloride-promoted rearrangement of N-allylhydrazones has been developed. Treatment of a number of aromatic N-allylhydrazones with copper(II) chloride provides the formation of both a new carbon−carbon bond and a carbon−chlorine bond in the same reaction. Substrate studies revealed that the carbon−carbon bond-forming step proceeds by way of a concerted [3,3] sigmatropicrearrangement and selectively generates
已开发出一种新的氯化铜 (II) 促进的 N-烯丙基腙重排。用氯化铜 (II) 处理许多芳香族 N-烯丙基腙在同一反应中形成新的碳-碳键和碳-氯键。底物研究表明,碳-碳键形成步骤通过协调一致的 [3,3] σ 重排进行,并选择性地生成反式取代的烯烃。