A Titanium(III)-Catalyzed Redox Umpolung Reaction for the Reductive Cross-Coupling of Enones with Acrylonitriles
作者:Jan Streuff
DOI:10.1002/chem.201100501
日期:2011.5.9
the job: 1,6‐Difunctionalized alkyl units, which are traditionally hard to access, have been successfully obtained through a reductive cross‐coupling of activatedalkenes catalyzed by TiIII. A plausible reaction mechanism that proceeds through redox umpolung of the enone is briefly discussed (see scheme, Cp=cyclopentadiene).
Direct conjugate alkylation of α,β-unsaturated carbonyls by Ti<sup>III</sup>-catalysed reductive umpolung of simple activated alkenes
作者:Plamen Bichovski、Thomas M. Haas、Manfred Keller、Jan Streuff
DOI:10.1039/c5ob02631h
日期:——
The titanium(III)-catalysed cross-selective reductive umpolung of Michael-acceptors represents a unique direct conjugate β-alkylation reaction. It allows the cross-selective preparation of 1,6- and 1,4-difunctionalised building blocks without the requirement of stoichiometric organometallic reagents. In this full paper, the development and scope of the titanium(III)-catalysed cross-selective reductive