Alkyne Hydroacylation: Switching Regioselectivity by Tandem Ruthenium Catalysis
作者:Qing-An Chen、Faben A. Cruz、Vy M. Dong
DOI:10.1021/ja512015w
日期:2015.3.11
By using tandem Ru-catalysis, internal alkynes can be coupled with aldehydes for the synthesis of β,γ-unsaturated ketones. The catalyst promotes alkyne transformations with high regioselectivity, with examples that include the differentiation of a methyl vs ethyl substituent on the alkyne. Mechanistic studies suggest that the regioselectivity results from a selective allene formation that is governed
An efficient cross-addition reaction of dienes with aldehydes was developped by using RuHCI(CO)(PPh3)(3) as a catalyst to give a wide variety of beta,gamma-unsaturated ketones, where a pi-allylruthenium species, derived from hydroruthenation of diene, may be involved as a key intermediate.
STEINIGER, M.;SCHAEFER, H. J., ANGEW. CHEM., 1982, 94, N 1, 75-76
作者:STEINIGER, M.、SCHAEFER, H. J.
DOI:——
日期:——
STEINIGER, MICHAEL;SCHAFER, HANS J., BULL. CHEM. SOC. JAP., 61,(1988) N 1, 125-132
作者:STEINIGER, MICHAEL、SCHAFER, HANS J.
DOI:——
日期:——
Oxidative Conversion of Silyl Enol Ethers to α,β-Unsaturated Ketones Employing Oxoammonium Salts
The oxidative conversion of silylenolethers to α,β-unsaturated ketones using a less-hindered class of oxoammonium salts (AZADO+BF4–) is described. The reaction proceeds via the ene-like addition of oxoammonium salts to silylenolethers.