Visible-Light Induction/Brønsted Acid Catalysis in Relay for the Enantioselective Synthesis of Tetrahydroquinolines
作者:Wenhui Xiong、Shan Li、Bo Fu、Jinping Wang、Qiu-An Wang、Wen Yang
DOI:10.1021/acs.orglett.9b01354
日期:2019.6.7
An efficient method merging Brønsted acid catalysis with visible-light induction for the highly enantioselectivesynthesis of tetrahydroquinolines has been developed. This mild process directly transforms 2-aminoenones into 2-substituted tetrahydroquinolines with excellent enantioselectivities through a relay visible-light-induced cyclization/chiral phosphoric acid-catalyzed transfer hydrogenation
Asymmetric synthesis of CF<sub>3</sub>-containing tetrahydroquinoline via a thiourea-catalyzed cascade reaction
作者:Yuanyuan Zhu、Boyu Li、Cui Wang、Zhenghao Dong、Xiaoling Zhong、Kairong Wang、Wenjin Yan、Rui Wang
DOI:10.1039/c7ob01013c
日期:——
An organocatalytic asymmetric method for the synthesis of 2-CF3 tetrahydroquinoline has been achieved. The cascadereaction of 2-aminochalcones with β-CF3 nitroalkenes afforded the products bearing three contiguous stereogenic centers in good yields with excellent diastereoselectivities and enantioselectivities.
Selective Synthesis of Quinolines and Indoles: Sulfur-Assisted or Selenium-Catalyzed Reaction of β-(2-Nitrophenyl)-α,β-unsaturated Ketones with Carbon Monoxide
A simple and selective synthetic method of quinolines and indoles by the reaction of β-(2-nitrophenyl)-α,β-unsaturatedketones with carbonmonoxide was developed. When β-(2-nitrophenyl)-α,β-unsaturatedketones were allowed to react with carbonmonoxide and water in the presence of a stoichiometric amount of sulfur or a catalytic amount of selenium, the corresponding quinolines were produced in moderate-to-good
One pot synthesis of pyrrolo[3,4-c]quinolinone/pyrrolo[3,4-c]quinoline derivatives from 2-aminoarylacrylates/2-aminochalcones and tosylmethyl isocyanide (TosMIC)
作者:Xin-Mou Lu、Jian Li、Zhong-Jian Cai、Rong Wang、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1039/c4ob01580k
日期:——
An efficient and practical synthetic approach to access to 2H-pyrrolo[3,4-c]quinolin-4(5H)-one/2H-pyrrolo[3,4-c]quinoline derivatives by the reaction of 2-aminoarylacrylates/2-aminochalcones and tosylmethyl isocyanide (TosMIC) via a one pot van Leusen reaction and cyclization under basic conditions has been reported. The desired products could be obtained in moderate to good yields.
unexpected [5 + 1 + 3] cascade cyclization to the preparation of benzo[4,5]thieno[3,2-d]pyrimidine derivatives has been disclosed. In the new protocol, o-nitrochalcones reacted with elemental sulfur and guanidine promoted by NaOH, which reacted in EtOH for 20 min, providing structurally diverse benzo[4,5]thieno[3,2-d]pyrimidines with good yields (77–89%) and wide substrate compatibility (33 examples)
已经公开了用于制备苯并[4,5]噻吩并[3,2- d ]嘧啶衍生物的意想不到的[5+1+3]级联环化。在新方案中,邻硝基查尔酮与 NaOH 促进的元素硫和胍反应,在 EtOH 中反应 20 分钟,提供结构多样的苯并[4,5]噻吩并[3,2- d ]嘧啶,收率良好(77- 89%)和广泛的基材兼容性(33 个示例)。