Asymmetric Visible-Light Photoredox Cross-Dehydrogenative Coupling of Aldehydes with Xanthenes
作者:Evgeny Larionov、Marco M. Mastandrea、Miquel A. Pericàs
DOI:10.1021/acscatal.7b02659
日期:2017.10.6
cross-coupling of two C(sp3)–H bonds employing visiblelight as an economical and environmentally benign source of energy. Photoredox catalysis is used for the oxidation of a diarylmethane to the corresponding cation, which is then trapped by an enamine intermediate generated in situ from an aldehyde reactant and a secondary amine organocatalyst. Notably, this mild method is an ideal synthetic approach from the
Organocatalytic Enantioselective Dehydrogenative<i>α</i>-Alkylation of Aldehydes with Benzylic Compounds
作者:Fen Huang、Lubin Xu、Jian Xiao
DOI:10.1002/cjoc.201200850
日期:2012.11
The highly enantioselective cross‐dehydrogenativecoupling of aldehydes with benzylic compounds has been developed as an efficient and rapid protocol for synthesis of enantioriched α‐alkylated aldehydes.
Merging Organocatalysis with Transition Metal Catalysis: Highly Stereoselective α-Alkylation of Aldehydes
作者:Jian Xiao
DOI:10.1021/ol3002859
日期:2012.4.6
The unprecedented cooperative systems involving a diarylprolinol silyl ether with various Lewis acids have been found to effect the highly enantioselective intermolecular alpha-alkylation of aldehydes. A wide variety of aldehydes and alcohols can be transformed into the desired highly functionalized aldehydes In high yields, excellent enantioselectivities, and good diastereoselectivities at room temperature under mild conditions.