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
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
DDQ-Mediated Oxidative Coupling: An Approach to 2,3-Dicyanofuran (Thiophene)
作者:Zheng-Lin Wang、Hong-Liang Li、Li-Shi Ge、Xing-Lan An、Zi-Gang Zhang、Xiaoyan Luo、John S. Fossey、Wei-Ping Deng
DOI:10.1021/jo4026034
日期:2014.2.7
A facile oxidative coupling of alpha-carbonyl radicals to 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) for the synthesis of 2,3-dicyanofurans and thiophenes starting from readily available beta-diketones, simple ketones, and beta-keto thioamides in up to 95% yield in one step was developed. Mechanistic investigations revealed that a radical process could be involved in this transformation, and a water promoted C-C bond cleavage pathway is proposed for the formation of 2,3-dicyanofurans and thiophenes.