A highlyenantioselective 1,4-addition of aryltrialkoxysilanes to α,β-unsaturated esters and amides was successfully catalyzed by a chiral rhodiumcomplex generated from [Rh(cod)(MeCN)2]BF4 and (S)-BINAP.
An asymmetric sp3–sp3 cross-electrophile coupling using ‘ene’-reductases
作者:Haigen Fu、Jingzhe Cao、Tianzhang Qiao、Yuyin Qi、Simon J. Charnock、Samuel Garfinkle、Todd K. Hyster
DOI:10.1038/s41586-022-05167-1
日期:2022.10.13
XEC between alkyl halides and nitroalkanes catalyzed by flavin-dependent ‘ene’-reductases. Photoexcitation of the enzyme-templated charge-transfer complex between an alkyl halide and flavin cofactor enables the chemoselective reduction of alkyl halide over the thermodynamically favored nitroalkane partner. The key C–C bond-forming step occurs via the reaction of an alkyl radical with an in situ generated
Asymmetric <i>C</i>-Alkylation of Nitroalkanes <i>via</i> Enzymatic Photoredox Catalysis
作者:Haigen Fu、Tianzhang Qiao、Jose M. Carceller、Samantha N. MacMillan、Todd K. Hyster
DOI:10.1021/jacs.2c12197
日期:2023.1.18
Tertiary nitroalkanes and the corresponding α-tertiary amines represent important motifs in bioactive molecules and natural products. The C-alkylation of secondary nitroalkanes with electrophiles is a straightforward strategy for constructing tertiary nitroalkanes; however, controlling the stereoselectivity of this type of reaction remains challenging. Here, we report a highly chemo- and stereoselective