Synthesis, including asymmetric synthesis, of 3-oxabicyclo[3.1.0]hexanes and bicyclo[3.1.0]hexanes by the 1,5-CH insertion of cyclopropylmagnesium carbenoids as the key reaction
give 3-oxabicyclo[3.1.0]hexanes or bicyclo[3.1.0]hexanes bearing an ether group at the 4-position in moderate to good yields. When this procedure was carried out starting with enantiopure dichloromethyl p-tolyl sulfoxide, enantiopure 3-oxabicyclo[3.1.0]hexanes were obtained in good overall yields. These procedures provide a good way for the synthesis, including asymmetric synthesis, of multisubstituted
Synthesis of β,
<scp>γ‐unsaturated</scp>
ketones with quaternary centers through regioselective hydroacylation of allenes with acyl chlorides
作者:Subin Yoon、Kyeongmin Lee、Telma Kamranifard、Yunmi Lee
DOI:10.1002/bkcs.12629
日期:2022.12
The one-pot synthesis of β,γ-unsaturatedketones bearing all-carbon quaternary centers at the α-position via a highly regioselective hydroacylation of allenes using acyl chlorides and aluminum hydride is reported. The Cu-catalyzed hydroalumination of 1,1-disubstituted and 1,1,3-trisubstituted allenes with diisobutylaluminum hydride resulted in allylaluminum reagents that underwent regioselective acylation
Copper-Catalyzed Hydroalumination of Allenes with Diisobutylaluminum Hydride: Synthesis of Allylic Ketones with α-Quaternary Centers via Tandem Allylation/Oppenauer Oxidation
作者:Sangback Lee、Sanghyun Lee、Yunmi Lee
DOI:10.1021/acs.orglett.0c01876
日期:2020.8.7
straightforward approach to allylaluminum reagent synthesis through Cu-catalyzed hydroalumination of readily accessible allenes with diisobutylaluminum hydride is described. The N-heterocyclic carbene-based copper complex promotes hydride addition to various functionalized allenes under mild reaction conditions. The catalytic reaction is applied to a highlyselective one-pot synthesis of allylic ketones