[EN] VISIBLE-LIGHT MEDIATED ORGANOPHOTOREDOX CATALYTIC DEUTERATION OF AROMATIC AND ALIPHATIC ALDEHYDES<br/>[FR] DEUTÉRATION CATALYTIQUE ORGANO-PHOTOREDOX D'ALDÉHYDES AROMATIQUES ET ALIPHATIQUES PAR L'INTERMÉDIAIRE DE LUMIÈRE VISIBLE
申请人:UNIV ARIZONA
公开号:WO2021118827A1
公开(公告)日:2021-06-17
Described are methods for preparing a deuterated aldehyde using with a photocatalyst and a hydrogen atom transfer agent in a H2O free solvent comprising D2O and an organic solvent under an inert gas. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions.
Catalytic Allylation of Aldehydes Using Unactivated Alkenes
作者:Shun Tanabe、Harunobu Mitsunuma、Motomu Kanai
DOI:10.1021/jacs.0c04735
日期:2020.7.15
and a chromium complex catalyst, enabling catalytic allylation of aldehydes with simplealkenes, including feedstock lower alkenes. The reaction proceeded under visible-light irradiation at room temperature and with high functional group tolerance. The reaction was extended to an asymmetric variant by employing a chiral chromium complex catalyst.
Deuteration of Formyl Groups via a Catalytic Radical H/D Exchange Approach
作者:Yueteng Zhang、Peng Ji、Yue Dong、Yongyi Wei、Wei Wang
DOI:10.1021/acscatal.9b05300
日期:2020.2.7
represents the straightforward approach to C-1 deuterated aldehydes. This transformation has been recently realized by transitionmetal and NHC carbene catalysis. Mechanistically, all of these processes involve an ionic pathway. Herein, we report a distinct photoredox catalytic, visible light mediated neutral radical approach. Selective control of highly reactive acyl radical in the energy barrier surmountable
We developed a chromium-catalyzed, photochemical, and linear-selective alkylation of aldehydes with alkylzirconium species generated in situ from a wide range of alkenes and Schwartz’s reagent. Photochemical homolysis of the C–Zr bond afforded alkyl radicals, which were then trapped by a chromium complex catalyst to generate the alkylchromium(III) species for polar addition to aldehydes. The reaction
Photocatalytic Generation of π-Allyltitanium Complexes from Butadiene via a Radical Strategy
作者:Fusheng Li、Shuangjie Lin、Lei Shi、Xiyu Li
DOI:10.1055/s-0040-1706024
日期:2021.6
is of great appeal to the synthetic community as well as industrial applications. This study reports a conceptually new radical strategy for the photocatalytic generation of π-allyltitanium complexesfrombutadiene. This novel and environmentally benign strategy enables the direct three-component allylation of carbonyls with 1,3-butadiene and α-bromocarboxylates, providing rapid access to valuable homoallylic