Well-Defined and Robust Rhodium Catalysts for the Hydroacylation of Terminal and Internal Alkenes
作者:Amparo Prades、Maitane Fernández、Sebastian D. Pike、Michael C. Willis、Andrew S. Weller
DOI:10.1002/anie.201503208
日期:2015.7.13
A Rh‐catalyst system based on the asymmetric ligand tBu2PCH2P(o‐C6H4OMe)2 is reported that allows for the hydroacylation of challenging internalalkenes with β‐substituted aldehydes. Mechanistic studies point to the stabilizing role of both excess alkene and the OMe‐group.
据报道,基于不对称配体t Bu 2 PCH 2 P( o -C 6 H 4 OMe) 2的 Rh 催化剂系统可以用 β 取代醛对具有挑战性的内烯烃进行加氢酰化。机理研究指出了过量烯烃和 OMe 基团的稳定作用。
Exploiting rhodium-catalysed ynamide hydroacylation as a platform for divergent heterocycle synthesis
作者:Robert N. Straker、Manjeet K. Majhail、Michael C. Willis
DOI:10.1039/c7sc03795c
日期:——
yield and excellent regioselectivity from the combination of aldehydes and ynamides. The enaminone products are subsequently used as a platform to construct a diverse array of substitutedpyrazoles, pyrimidines, and isoxazoles in a two-step, one-pot sequence. It was found that with judicious choice of catalyst system it was possible to overturn the regioselectivity of the hydroacylation reaction to
Diverse saturated heterocycles from a hydroacylation/conjugate addition cascade
作者:Ndidi U. N. Iwumene、Daniel. F. Moseley、Robert D. C. Pullin、Michael C. Willis
DOI:10.1039/d1sc06900d
日期:——
Rhodium-catalyzed hydroacylation using alkynes substituted with pendant nucleophiles, delivers linear α,β-unsaturated enone intermediates with excellent regioselectivity. These adducts are used to construct a broad range of diversely substituted, saturated O-, N- and S-heterocycles in a one-pot process. Judicious choice of cyclisation conditions enabled isolation of O-heterocycles with high levels