Synthesis of 4-arylethyl-6-arylpyrimidine-2-thiols through aza-Michael addition/nucleophilic addition/aromatization tandem reactions
作者:Zheng Li、Wenli Song、Jiaojiao He、Yan Du、Jingya Yang
DOI:10.1515/hc-2017-0169
日期:2018.2.23
Abstract An efficient method for the synthesis of the title compounds by reactions of divinyl ketones with thiourea is described. This protocol has the advantages of high yields, mild reaction conditions and simple work-up procedure.
A highly organocatalytic stereoselective double Michael reaction: efficient construction of optically enriched spirocyclic oxindoles
作者:Liang-Liang Wang、Lin Peng、Jian-Fei Bai、Li-Na Jia、Xi-Ya Luo、Qing-Chun Huang、Xiao-Ying Xu、Li-Xin Wang
DOI:10.1039/c1cc11223f
日期:——
An array of spirocyclic oxindoles have been constructed via a double Michael reaction in high yields and excellent enantioselectivities.
一系列螺环氧吲哚化合物已经通过双Michael反应高产率和优异对映选择性构建。
Asymmetric Double Michael Reaction Catalyzed by Simple Primary Amine Catalysts: A Straightforward Approach to Construct Spirocyclic Oxindoles
作者:Xiya Luo、Liangliang Wang、Lin Peng、Jianfei Bai、Lina Jia、Guangyun He、Fang Tian、Xiaoying Xu、Lixin Wang
DOI:10.1002/cjoc.201100543
日期:2012.5
The enantioselective doubleMichaelreaction of N‐Boc‐3‐nonsubstitued oxindoles with dienones catalyzed by chiral monoimide protected cyclohexane‐1,2‐diamines was developed. A wide range of optically active spirocyclic oxindoles were obtained up to 98% yield and up to 89% ee.
Phosphazene Base-Catalyzed Double Michael Addition: Stereoselective Synthesis of Cyclohexanones
作者:Yang-Guo Li、Yang Zhang、Guang-Fen Du、Cheng-Zhi Gu、Lin He
DOI:10.2174/1570178615666180912115748
日期:2018.12.4
Phosphazene bases have been utilized as efficient organocatalysts to catalyze the double Michael additions of divinyl ketones with active methylenes to afford functionalized cyclohexanones in 36-91% yields with >25:1 diastereoselectivity.
Synthesis of Optically Enriched Spirocyclic Benzofuran-2-ones by Bifunctional Thiourea-Base Catalyzed Double-Michael Addition of Benzofuran-2-ones to Dienones
A highly enantioselective catalytic double‐Michael addition reaction of substituted benzofuran‐2‐ones with divinyl ketones promoted by readily accessible tertiary amine–thiourea Cinchona alkaloids has been developed. A number of opticallyenrichedspirocyclic benzofuran‐2‐ones were prepared in very good yields (up to 99 %), diastereoselectivities (up to 19:1 d.r.), and very good enantioselectivities