开发了一种简单的方法,在铜(I,II)催化下,从苯甲醛,2-氨基噻唑和炔烃开始合成官能化的咪唑并[ 2,1- b ]噻唑。该协议允许构建各种芳基取代的咪唑并[2,1- b ]苯并噻唑,-[2,1- b ]噻唑和-[2,1- b ] [1,3,4]噻二唑。反应易于进行,以33–93%的收率提供了大多数所需的产物。在连续流反应器中工艺的强化将产品的收率提高到定量。
Organocatalytic enantioselective aza-Friedel–Crafts reaction between benzothiazolimines and 2-naphthols for the preparation of chiral 2′-aminobenzothiazolomethyl naphthols
作者:Chen-Yi Li、Min Xiang、Jian Zhang、Wen-Sheng Li、Ying Zou、Fang Tian、Li-Xin Wang
DOI:10.1039/d1ob01443a
日期:——
developed, and a series of chiral 2′-aminobenzothiazolomethyl naphthols with potential antiproliferative and anthelminticactivities have been successfully and effectively prepared in good to excellent yields (up to 98%) with excellent enantioselectivities (up to >99% ee) even in a scale-up preparation under mild conditions.
Enantioselective Aza-Henry Reaction of Imines Bearing a Benzothiazole Moiety Catalyzed by a<i>Cinchona</i>-Based Squaramide
作者:Hai-Xiao He、Wen Yang、Da-Ming Du
DOI:10.1002/adsc.201200957
日期:2013.4.15
efficient enantioselective aza‐Henry reaction of nitroalkanes to imines bearing a benzothiazole moiety catalyzed by a Cinchona‐based squaramide has been developed. In the reaction of imines, the corresponding products were obtained in good to excellent yields (up to 99%) with excellent enantioselectivities (up to >99% ee) for most of the aromatic substituted imines. The imines with electron‐withdrawing groups
Asymmetric synthesis of benzothiazolopyrimidines with high catalytic efficiency and stereoselectivity under bifunctional phosphonium salt systems
作者:Dongming Lu、Jia-Hong Wu、Jianke Pan、Xue Chen、Xiaoyu Ren、Tianli Wang
DOI:10.1039/d0cc04820h
日期:——
allenoates mediated by an amino acid-derived bifunctional phosphonium salt catalyst is developed. This protocol provides a new and facile synthetic approach to create a broad range of isothiourea-based benzothiazolopyrimidine derivatives under mild reaction conditions with high isolated yields and excellent diastereo- and enantioselectivities.
Rational Design of Axially Chiral Styrene‐Based Organocatalysts and Their Application in Catalytic Asymmetric (2+4) Cyclizations
作者:Si‐Jia Liu、Zhi‐Han Chen、Jia‐Yi Chen、Shao‐Fei Ni、Yu‐Chen Zhang、Feng Shi
DOI:10.1002/anie.202112226
日期:2022.2.7
A new class of axiallychiral styrene-based organocatalysts has been rationally designed. They enable the chemo-, diastereo- and enantioselective (2+4) cyclization of 2-benzothiazolimines. This work represents the first design of styrene-based chiral thiourea tertiary amine catalysts and the first catalyticasymmetric (2+4) cyclization of 2-benzothiazolimines, and it gives an in-depth understanding
Organocatalytic Enantioselective Strecker Reaction of Imines Containing a Thiazole Moiety by Using a Cinchona-Based Squaramide Catalyst
作者:Hai-Xiao He、Da-Ming Du
DOI:10.1002/ejoc.201402764
日期:2014.10
organocatalytic enantioselective Strecker reaction was developed for the synthesis of α-amino nitriles that contain a thiazole moiety by using a cinchona-based squaramide catalyst. The corresponding products were obtained in good to excellent yields (up to 99 %) with excellent enantioselectivities (up to 98 % ee) by starting from aromatic-substituted imines. In addition, two trifunctional squaramides