Asymmetric Michael Addition of Substituted Rhodanines to α,β-Unsaturated Ketones Catalyzed by Bulky Primary Amines
摘要:
A bulky group was introduced by design into a diamine catalyst, and a series of robust and tunable bulky chiral primary amine catalysts were developed and successfully applied in the direct conjugate addition of substituted rhodanines to alpha,beta-unsaturated ketones. High yields (up to 99%) and excellent diastereoselectivities (up to 99:1 dr) and enantioselectivities (up to 98% ee) were observed.
Asymmetric Michael Addition of Substituted Rhodanines to α,β-Unsaturated Ketones Catalyzed by Bulky Primary Amines
摘要:
A bulky group was introduced by design into a diamine catalyst, and a series of robust and tunable bulky chiral primary amine catalysts were developed and successfully applied in the direct conjugate addition of substituted rhodanines to alpha,beta-unsaturated ketones. High yields (up to 99%) and excellent diastereoselectivities (up to 99:1 dr) and enantioselectivities (up to 98% ee) were observed.
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.