Chemo- and regioselective synthesis of polysubstituted 2-aminothiophenes by the cyclization of<i>gem</i>-dibromo or<i>gem</i>-dichloroalkenes with β-keto tertiary thioamides
作者:Xuxue Zhang、Chuan Liu、Yupian Deng、Song Cao
DOI:10.1039/d0ob01821j
日期:——
A facile and practical method for the synthesis of 2,3,4-trisubstituted 2-aminothiophenes by the cyclization ofgem-dibromoalkenes orgem-dichloroalkenes with β-keto tertiary thioamides has been developed.
Regioselective Metal-Free One-Pot Synthesis of Functionalized 2-Aminothiophene Derivatives
作者:Xiaoyan Luo、Li-Shi Ge、Xing-Lan An、Jing-Hai Jin、Yu Wang、Pei-Pei Sun、Wei-Ping Deng
DOI:10.1021/acs.joc.5b00488
日期:2015.5.1
A facile metal-free synthesis of 2-aminothiophene derivatives by the reaction of 2-ynals with thioamides in alcohols has been developed. This transformation allows the assembly of 2-aminothienyl ether derivatives via a well-designed aldol condensation/regioselective intramolecular cyclization/conjugateaddition cascade reaction and provides a straightforward synthetic protocol for constructing 2,3
Direct synthesis of polysubstituted 2-aminothiophenes by Cu(<scp>ii</scp>)-catalyzed addition/oxidative cyclization of alkynoates with thioamides
作者:Li-Shi Ge、Zheng-Lin Wang、Xing-Lan An、Xiaoyan Luo、Wei-Ping Deng
DOI:10.1039/c4ob01534g
日期:——
A facile and direct synthetic method was developed for the construction of structurally important 2-aminothiophenes in moderate to excellent yields (up to 91%), via Cu(II)-catalyzed addition/oxidative cyclization of readily available thioamides with alkynoates under an air atmosphere.
Synthesis of N,N-disubstituted 2-aminothiophenes by the cyclization of gem-difluoroalkenes with β-keto thioamides
作者:Xuxue Zhang、Mingsheng Wu、Juan Zhang、Song Cao
DOI:10.1039/c7ob00368d
日期:——
gem-difluoroalkenes with β-keto tertiary thioamides is described. The reactions proceed smoothly with the assistance of K2CO3 under transition-metal-free conditions, affording a variety of valuable N,N-disubstituted 2-aminothiophenes in moderate to good yields.
描述了一种新的有效的方法,该方法可通过用β-酮基叔硫酰胺环合宝石-二氟烯烃来构建高度官能化的氨基噻吩。在无过渡金属的条件下,反应在K 2 CO 3的帮助下顺利进行,以中等至良好的收率提供了各种有价值的N,N-二取代的2-氨基噻吩。
Synthesis of Polysubstituted 3-Aminothiophenes from Thioamides and Allenes via Tandem Thio-Michael Addition/Oxidative Annulation and 1,2-Sulfur Migration
作者:Teng Han、Yu Wang、Hong-Liang Li、Xiaoyan Luo、Wei-Ping Deng
DOI:10.1021/acs.joc.7b02616
日期:2018.2.2
A facile synthetic method for the construction of 3-aminothiophenes from readily available thioamides and alllenes in the presence of a TBAI/TBHP catalyst system was developed. This protocol represents an efficient and straightforward way to access highly functionalized thiophenes in moderate to excellent yields under mild conditions, via a tandem thio-Michael addition, oxidative annulation, and 1