Copper-Catalyzed Asymmetric Conjugate Additions of Bis(pinacolato)diboron and Dimethylzinc to Acyl-<i>N</i>-methylimidazole Michael Acceptors: A Highly Stereoselective Unified Strategy for 1,3,5,...<i>n</i> (OH, Me) Motif Synthesis
作者:Jimmy Lauberteaux、Christophe Crévisy、Olivier Baslé、Renata Marcia de Figueiredo、Marc Mauduit、Jean-Marc Campagne
DOI:10.1021/acs.orglett.9b00479
日期:2019.3.15
(OH, Me) motifs based on consecutive copper-catalyzed asymmetric conjugate borylation (ACB) and methylation (ACA) reactions involving α,β-unsaturated 2-acyl-N-methylimidazoles is described. Good yields and high diastereoselectivities have been obtained in ACA and ACB reactions for both matched and mismatched pairs as illustrated in the synthesis of syn/anti and anti/anti (Me, OTBS, Me) and (OH, OTBS
为建设一个统一的策略流行1,3,5,... Ñ(OH,Me)的基序基于连续铜催化不对称共轭硼化(ACB)和涉及α,β -不饱和的甲基化(ACA)反应2-描述了酰基-N-甲基咪唑。在ACA和ACB反应中,对于匹配对和错配对,都获得了高收率和高非对映选择性,如合成syn / anti和anti / anti(Me,OTBS,Me)和(OH,OTBS,Me)基序所示。