Direct Asymmetric α-Allylation of Aldehydes with Simple Allylic Alcohols Enabled by the Concerted Action of Three Different Catalysts
作者:Gaoxi Jiang、Benjamin List
DOI:10.1002/anie.201103263
日期:2011.9.26
catalysis: The title reaction between α‐branched aldehydes and allylic alcohols, which generates all‐carbon quaternary stereogenic centers, constitutes the first asymmetric Tsuji–Trost‐type α‐allylation of carbonyl compounds with allylic alcohol (see scheme). This reaction is catalyzed by three different species, [Pd(PPh3)4], the chiralBrønstedacid TRIP, and benzhydryl amine.
Rhodium-Catalyzed Tandem Isomerization–Allylation: From Diallyl Carbonates to α-Quaternary Aldehydes
作者:Jeanne Masson-Makdissi、Young Jin Jang、Liher Prieto、Mark S. Taylor、Mark Lautens
DOI:10.1021/acscatal.9b04128
日期:2019.12.6
isomerization–allylation sequence for the generation of α-quaternary aldehydes, starting from unsymmetrical diallyl carbonates. This reaction features a highly selective oxidative addition of the rhodium catalyst, leading to the discrimination of electrophilic and nucleophilic elements of various diallyl carbonates. A rhodium-enolate and an allyl electrophile are produced catalytically in situ in a controlled fashion