Organocatalytic Asymmetric Michael Addition of Rhodanines to Azadienes for Assembling of Sulfur‐containing Tetrasubstituted Carbon Stereocenters
作者:Wei Lin、Chen Zhang、Wen Xu、Yuyu Cheng、Pengfei Li、Wenjun Li
DOI:10.1002/adsc.201801422
日期:2019.2
The squaramide catalyzed enantioselective Michaeladdition of rhodanines to 2‐arylidene‐N‐tosylbenzofuran‐3(2H)‐imines has been established, which enables the formation of benzofurans bearing both rhodanine and sulfur‐containingtetrasubstitutedstereocenter structural motif in good to high yields with good to excellent enantio‐ and diastereoselectivities.
Enantioselective γ -addition reaction of rhodanines to allenoates catalyzed by chiral phosphine-carbamate
作者:Tian-Chen Kang、Lu-Ping Wu、Feng Sha、Xin-Yan Wu
DOI:10.1016/j.tet.2017.12.050
日期:2018.3
Phosphine-catalyzed enantioselective γ-additions of rhodanines to allenoates have been developed for the first time. With the employment of chiral cyclohexane-based phosphines, a wide range of substituted rhodanine derivatives containing tertiary chiral centers were constructed in good yields and high enantioselectivities.
Enantioselective Construction of Vicinal Sulfur-containing Tetrasubstituted Stereocenters via Organocatalyzed Mannich-Type Addition of Rhodanines to Isatin Imines
作者:Qiuhong Huang、Lili Zhang、Yuyu Cheng、Pengfei Li、Wenjun Li
DOI:10.1002/adsc.201800642
日期:2018.9.3
isatin‐derived imines as suitable partners under chiral squaramide catalysis. By using this strategy, the resulting 3‐substituted 3‐amino‐2‐oxindoles featuring both rhodanine and vicinal sulfur‐containing tetrasubstituted stereocenters structural motifs were obtained in high yields with excellent enantioselectivities and diastereoselectivities.