Asymmetric Transfer Hydrogenation of (Hetero)arylketones with Tethered Rh(III)–<i>N</i>-(<i>p</i>-Tolylsulfonyl)-1,2-diphenylethylene-1,2-diamine Complexes: Scope and Limitations
A series of new tethered Rh(III)/Cp* complexes containing the N-(p-tolylsulfonyl)-1,2-diphenylethylene-1,2-diamine ligand have been prepared, characterized, and evaluated in the asymmetric transfer hydrogenation (ATH) of a wide range of (hetero)aryl ketones. The reaction was performed under mild conditions with the formic acid/triethylamine (5:2) system as the hydrogen source and provided enantiomerically
Direct Access to 9/6‐Fused Cycles via Sequential Hydride Shift Mediated Double C(
<i>sp</i>
<sup>3</sup>
)−H Bond Functionalization
作者:Issei Nakamura、Masahiro Anada、Shunsuke Sueki、Kosho Makino、Keiji Mori
DOI:10.1002/adsc.202201354
日期:2023.2.21
We have developed a sequentialhydrideshift process involving a [1,8]-hydride shift. When cinnamylidene malonates having a biphenyl core were treated with 30 mol% Yb(OTf)3 and 10 mol% iPr2NEt, the desired sequential [1,8]-[1,5]-hydride shift process proceeded smoothly to afford synthetically challenging nine-membered carbocycle-fused piperidine derivatives in good chemical yields (up to 77%). Notably