Enantioselective Sulfonation of Enones with Sulfonyl Imines by Cooperative N-Heterocyclic-Carbene/Thiourea/Tertiary-Amine Multicatalysis
作者:Zhichao Jin、Jianfeng Xu、Song Yang、Bao-An Song、Yonggui Robin Chi
DOI:10.1002/anie.201305023
日期:2013.11.18
make light work: In an organocatalytic asymmetric sulfonation of enones, the activation of a sulfonylimine by an N‐heterocyclic carbene (NHC) catalyst led to the release of a sulfinic anion, which underwent nucleophilicaddition to the enone. The enantioselectivity of the process was controlled by a chiral thiourea/amine co‐catalyst through anion recognition and hydrogen‐bonding interactions. Tol=p‐tolyl
Synthesis of
<i>γ</i>
-keto sulfones
<i>via</i>
sulfa-Michael reactions in Brønsted acidic deep eutectic solvent
作者:Ya-Juan Fan、Dan Wang、Liang Wang
DOI:10.1080/10426507.2023.2240933
日期:2023.12.2
A facile sulfonylation of activated alkenes employing sodium arylsulfinates in Brønsted acidic deep eutectic solvent at room temperature has been developed. The choline chloride/p-toluenesulfonic a...