Synthesis of 2-Oxazolones and α-Aminoketones via Palladium-Catalyzed Reaction of β,β-Dibromoenamides
作者:David I. Chai、Laura Hoffmeister、Mark Lautens
DOI:10.1021/ol102634c
日期:2011.1.7
beta,beta-Dibromoenamides show two different interesting reactivities based on the choice of R group under the reaction conditions. On the basis of mechanistic studies, both reactions proceed via an intermolecular Suzuki-Miyaura C-C coupling and an intramolecular C-O coupling.
Krieg,B.; Konieczny,P., Justus Liebigs Annalen der Chemie, 1976, p. 1862 - 1872
作者:Krieg,B.、Konieczny,P.
DOI:——
日期:——
Deconstructive isomerization of azetidinols <i>via</i> C–C bond cleavage enabled by N-heterocyclic carbene (NHC) catalysis
Herein, we describe an N-heterocycliccarbene (NHC)-catalyzed deconstructive isomerization of azetidinols via an inert C–C bond cleavage. It provides a direct and supplementary pathway to access α-amino ketone and oxazol-2-one derivatives in moderate to good yields. DFT calculation supports the proposed mechanism in which NHC undergoes a concerted proton transfer and ring-opening process. This reaction