Direct Synthesis of Polysubstituted Aldehydes via Visible-Light Catalysis
作者:Fengjin Wu、Leifeng Wang、Jiean Chen、David A. Nicewicz、Yong Huang
DOI:10.1002/anie.201712384
日期:2018.2.19
competing reaction pathways, commercial styrenes react with vinyl ethers selectively in the presence of an acridinium salt photooxidant and a disulfide hydrogen‐atom‐transfer catalyst under blue LED irradiation. Alkyl aldehydes with different substitution patterns are prepared in good yields. This strategy can be applied to structurally sophisticated substrates.
A General Organocatalytic System for Enantioselective Radical Conjugate Additions to Enals
作者:Emilien Le Saux、Dengke Ma、Pablo Bonilla、Catherine M. Holden、Danilo Lustosa、Paolo Melchiorre
DOI:10.1002/anie.202014876
日期:2021.3
enantioselective conjugate addition of carbon‐centered radicals to aliphatic and aromatic enals. The process uses an organic photoredox catalyst, which absorbs blue light to generate radicalsfrom stable precursors, in combination with a chiral amine catalyst, which secures a consistently high level of stereoselectivity. The generality of this catalytic platform is demonstrated by the stereoselective interception
Method for the Production of Optically Active Carbonyl
申请人:Jakel Christoph
公开号:US20080269528A1
公开(公告)日:2008-10-30
The present invention relates to a process for preparing optically active carbonyl compounds by asymmetrically hydrogenating α,β-unsaturated carbonyl compounds in the presence of optically active transition metal catalysts which are soluble in the reaction mixture and have at least one carbon monoxide ligand. The present invention especially relates to a process for preparing optically active aldehydes or ketones, in particular citronellal, by asymmetrically hydrogenating the corresponding optically active α,β-unsaturated aldehydes or ketones.
Synthesis of aryl-substituted aldehydes and ketones via palladium-catalyzed coupling of aryl halides and non-allylic unsaturated alcohols
作者:Richard C. Larock、Wai-Yee Leung、Sandra Stolz-Dunn
DOI:10.1016/s0040-4039(00)70636-8
日期:——
The palladium-catalyzed coupling of aryl halides and non-allylic unsaturatedalcohols affords excellent yields of aryl-substituted aldehydes and ketones.
METHOD FOR SYNTHESIZING OPTICALLY ACTIVE CARBONYL COMPOUNDS
申请人:Schmidt-Leithoff Joachim
公开号:US20100152494A1
公开(公告)日:2010-06-17
The present invention relates to a process for preparing optically active carbonyl compounds by asymmetrically hydrogenating α,β-unsaturated carbonyl compounds in the presence of optically active transition metal catalysts which are soluble in the reaction mixture and have at least one carbon monoxide ligand, the optically active catalyst which has at least one carbon monoxide ligand and is to be used in each case being prepared by pretreating a catalyst precursor with a gas mixture comprising carbon monoxide and hydrogen and the asymmetric hydrogenation being performed in the presence of carbon monoxide supplied additionally to the reaction mixture.