Stereoselective synthesis of 1-bromo- (or 1-chloro-) 1,1-difluoro-2- alkenes
作者:Frédérique Tellier、Raymond Sauvêtre
DOI:10.1016/0022-1139(95)03340-8
日期:1996.1
A highly regio- and stereo-selective method for the introduction of a bromo- (or chloro-) difluoromethylene group into various unsaturated systems is described. The key step is the treatment of 1,1-difluoro-1-alken-3-ols with thionyl bromide (or chloride).
Acyl tetramic acids. 6. Synthesis of 3-dienoyl tetramic acids related to streptolydigin and tirandamycin
作者:Ving J. Lee、Alan R. Branfman、Thomas R. Herrin、Kenneth L. Rinehart
DOI:10.1021/ja00481a036
日期:1978.6
Seel; Langer, Chemische Berichte, 1958, vol. 91, p. 2553,2557
作者:Seel、Langer
DOI:——
日期:——
Nickel-Catalyzed Enantioselective Coupling of Aldehydes and Electron-Deficient 1,3-Dienes Following an Inverse Regiochemical Course
作者:Thomas Q. Davies、Jae Yeon Kim、Alois Fürstner
DOI:10.1021/jacs.2c09328
日期:2022.10.19
The nickel catalyzed reductive coupling of aldehydes with sorbate esters and related electron-deficient 1,3-dienes are known in the literature to occur at the π-bond proximal to the ester to afford aldol-type products. In stark contrast to this established path, a VAPOL-derived phosphoramidite ligand in combination with a bench-stable nickel precatalyst brokers a regiocomplementary course in that C–C