Iron-Catalyzed C–C Single-Bond Cleavage of Alcohols
作者:Wei Liu、Qiang Wu、Miao Wang、Yahao Huang、Peng Hu
DOI:10.1021/acs.orglett.1c03137
日期:2021.11.5
An iron-catalyzed deconstruction/hydrogenation reaction of alcohols through C–C bond cleavage is developed through photocatalysis, to produce ketones or aldehydes as the products. Tertiary, secondary, and primary alcohols bearing a wide range of substituents are suitable substrates. Complex natural alcohols can also perform the transformation selectively. A investigation of the mechanism reveals a
Rhodium(I)/Diene-Catalyzed Addition Reactions of Arylborons with Ketones
作者:Yuan-Xi Liao、Chun-Hui Xing、Qiao-Sheng Hu
DOI:10.1021/ol300275s
日期:2012.3.16
Rh(I)/diene-catalyzed additionreactions of arylboroxines/arylboronic acids with unactivated ketones to form tertiary alcohols in good to excellent yields are described. By using C2-symmetric (3aR,6aR)-3,6-diaryl-1,3a,4,6a-tetrahydropentalenes as ligands, the asymmetric version of such an additionreaction, with up to 68% ee, was also realized.
描述了 Rh(I)/二烯催化的芳基环硼氧烷/芳基硼酸与未活化酮形成叔醇的加成反应,收率很好。通过使用C 2 -对称 (3a R ,6a R )-3,6-二芳基-1,3a,4,6a-四氢戊烯作为配体,这种加成反应的不对称形式,具有高达 68% ee,也实现了。
Copper/Selectfluor-System-Catalyzed Dehydration-Oxidation of Tertiary Cycloalcohols: Access to β-Substituted Cyclohex-2-enones, 4-Arylcoumarins, and Biaryls
作者:Shaobo Ren、Jian Zhang、Jiahui Zhang、Heng Wang、Wei Zhang、Yunkui Liu、Miaochang Liu
DOI:10.1002/ejoc.201500610
日期:2015.8
A route to β-substitutedcyclohex-2-enones, 4-arylcoumarins, and biaryls has been developed. This approach involves a one-pot Cu0/Selectfluor-catalyzed dehydration–oxidation of tertiary cycloalcohols. Thus, by using 2 equiv. of Selectfluor at 25 °C, the dehydration–oxidation of tertiary cyclohexanols and oxabenzocyclohexanols gave β-substitutedcyclohex-2-enones and 4-arylcoumarins, respectively; whereas
Catalytic Hydrogen Atom Transfer (HAT) for Sustainable and Diastereoselective Radical Reduction
作者:Andreas Gansäuer、Max Klatte、Gerhard M. Brändle、Joachim Friedrich
DOI:10.1002/anie.201202818
日期:2012.8.27
Going cyclic! A catalytic cycle and cyclic transition states enable a novel sustainable and catalytichydrogenatomtransfer (HAT) for highly diastereoselectiveradicalreductions. Readily available nontoxic silanes are the terminal reductants for epoxides that are opened by bifunctional titanocene(III) hydride catalysts.