Asymmetric Catalytic Preparation of Polysubstituted Cyclopropanol and Cyclopropylamine Derivatives
作者:Marwan Simaan、Ilan Marek
DOI:10.1002/anie.201710707
日期:2018.2.5
cyclopropenes followed by either an electrophilic oxidation or amination reaction provides a unique approach to the formation of diastereomerically pure and enantiomerically enriched cyclopropanol and cyclopropylamine derivatives, respectively.
Pd-Catalyzed Enantioselective Hydroalkynylation of Cyclopropenes
作者:Longyang Dian、Ilan Marek
DOI:10.1021/acscatal.9b04960
日期:2020.1.17
We report herein an easy, mild, and robust Pd-catalyzed enantioselective hydroalkynylation reaction of achiral cyclopropenes. Commercially available Pd(acac)2 and (R)-DM-BINAP proved to be the best combination to reach high diastereo- and enantioselectivities.
Gold(i)-catalysed alcohol additions to cyclopropenes
作者:Maximillian S. Hadfield、Jürgen T. Bauer、Pauline E. Glen、Ai-Lan Lee
DOI:10.1039/c0ob00085j
日期:——
Gold(I)-catalysed addition of alcohols to 3,3-disubstituted cyclopropenes occurs in a highly regioselective and facile manner to produce alkyl tert-allylic ethers in good yields. The reaction is tolerant of sterically hindered substituents on the cyclopropene as well as primary and secondary alcohols as nucleophiles. In this full article, we report on the substrate scope and plausible mechanism, as well as the regioselectivity issues arising from subsequent gold(I)-catalysed isomerisation of tertiary to primary allylic ethers.
in the literature. Herein, we report a nickel-catalyzed enantioselective hydrothiocarbonylation of cyclopropenes for the synthesis of a diverse collection of functionalized thioesters in good to excellent yields with high stereoselectivity. This new method employs an inexpensive, air-stable nickel(II) precursor, which provides enhanced catalyst fidelity against CO poisoning compared to nickel(0) catalysts
使用一氧化碳和硫醇对烯烃进行氢硫羰基化是从简单结构单元合成硫酯的有效方法。由于催化剂中毒的固有挑战,过渡金属催化的不对称硫代羰基化,特别是在利用地球丰富的金属时,在文献中仍然很少见。在此,我们报道了镍催化的环丙烯对映选择性硫代羰基化反应,用于合成多种官能化硫酯,收率良好至优异,具有高立体选择性。这种新方法采用廉价、空气稳定的镍 (II) 前驱体,与镍 (0) 催化剂相比,它可以提高催化剂保真度,防止 CO 中毒。