Enantioselective Synthesis of 5-Alkylated Thiazolidinones via Palladium-Catalyzed Asymmetric Allylic C–H Alkylations of 1,4-Pentadienes with 5<i>H</i>-Thiazol-4-ones
作者:Tian-Ci Wang、Zhi-Yong Han、Pu-Sheng Wang、Hua-Chen Lin、Shi-Wei Luo、Liu-Zhu Gong
DOI:10.1021/acs.orglett.8b01697
日期:2018.8.17
A palladium-catalyzed, enantioselective allylic C–H alkylation of 1,4-pentadienes with 5H-thiazol-4-ones has been developed. Under the cooperative catalysis of a palladium complex of chiral phosphoramidite ligand and an achiral Brønstedacid, a broad range of substituted 5H-thiazol-4-ones bearing sulfur-containing tertiary chiral centers were accessed from the allylic C–H alkylation in high levels
Remote Stereocontrolled Construction of Vicinal Axially Chiral Tetrasubstituted Allenes and Heteroatom-Functionalized Quaternary Carbon Stereocenters
作者:Pei Zhang、Qiuhong Huang、Yuyu Cheng、Rongshi Li、Pengfei Li、Wenjun Li
DOI:10.1021/acs.orglett.8b03801
日期:2019.1.18
alcohols have been achieved in the presence of chiral phosphoric acids. The remote stereocontrolled activation protocol provides an efficient and facile approach for the construction of vicinal axially chiral tetrasubstituted allenes and heteroatom-functionalized quaternary carbon stereocenters, which expands the synthetic potential of chiral phosphoric acids.
Organocatalytic Remote Stereocontrolled 1,8-Additions of Thiazolones to Propargylic Aza-<i>p</i>-quinone Methides
作者:Lili Zhang、Yuzhe Han、Anqi Huang、Pei Zhang、Pengfei Li、Wenjun Li
DOI:10.1021/acs.orglett.9b02726
日期:2019.9.20
remote stereocontrolled 1,8-conjugate addition of thiazolones to propargylic aza-p-quinone methides formed from propargylic alcohols has been developed with the aid of a chiral phosphoric acid, and this represents the first report on organocatalyticstereocontrolled 1,8-addition of propargylic aza-p-quinone methides. Notably, the remote stereocontrolled activation protocol enables the construction of vicinal