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.
Amino acids derived chiral bifunctional (thio)urea tertiary-amines catalyzed asymmetric henry reaction of α-trifluoromethy ketones
作者:Xiangyu Meng、Yueyang Luo、Gang Zhao
DOI:10.1016/j.tetlet.2020.152485
日期:2020.11
An asymmetric Henry reaction of α-trifluoromethyl ketones with nitroalkanes afforded α-trifluoromethyl-β-nitro alcohols catalyzed by novel bifunctional (thio)urea tertiary-amines derived from amino acids, in good yields with high enantioselectivities, which could be converted into promising structure motifs in pharmaceutical chemistry.