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.
Rhodanine and itsderivatives have been known as privileged structures in pharmacological research because of their wide spectrum of biological activities, but the synthesis method of rhodanine skeleton is limited. In this paper, not only rhodanine skeleton, but also N-aryl rhodanines can be directly prepared via the reaction of thioureas and thioglycolic acid in one step catalyzed by protic acid,
A novel route to 3,5,5-trisubstituted thiazolidine-4-ones
作者:M. Stefanović、A. Stojilković、A. Jokić
DOI:10.1016/0040-4020(65)80016-3
日期:1965.1
New 3,5,5-trisubstituted thiazolidine-4-one have been prepared by the reductive partial desulphurization of the corresponding 2-thiono derivatives.
通过相应的2-硫代衍生物的还原性部分脱硫制备了新的3,5,5-三取代的噻唑烷-4-酮。
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.