Iodine-mediated synthesis of sulfur-bridged enaminones and chromones via double C(sp<sup>2</sup>)–H thiolation
作者:Yong Gao、Li Wei、Yunyun Liu、Jie-Ping Wan
DOI:10.1039/c7ob00619e
日期:——
reactions of various enaminones with elemental sulfur giving rise to both sulfur-bridged enaminones and chromones have been realized via iodine promotion. All products were furnished by means of double C(sp2)–H bond thiolation without using any metal catalyst or sensitive oxidant, providing a simple and efficient protocol for the synthesis of diverse sulfur derivatives of enaminones.
Metal-free synthesis of 1,3,5-trisubstituted benzenes by the cyclotrimerization of enaminones or alkynes in water
作者:Jie-Ping Wan、Yunfang Lin、Kaikai Hu、Yunyun Liu
DOI:10.1039/c4ra00475b
日期:——
The cyclotrimerization reactions of enaminones and electron deficient terminal alkynes have been efficiently performed in water in the presence of only a small amount of lactic acid. The reactions led to the green synthesis of a variety of 1,3,5-triacylbenzenes without using any metal as catalyst. Brief investigation on different elaboration of the triacylbenzene product demonstrated the versatile
Enaminone-Based Three-Component Reactions for the Diastereoselective Synthesis of Fused Tetrahydropyridines
作者:Jie-Ping Wan、Shanshan Zhong、Yunyun Liu
DOI:10.1055/s-0034-1378875
日期:——
Abstract An environmentally benign multicomponent synthetic method has been realized for the diastereoselective construction of fused tetrahydropyridines. Structurally diverse products have been acquired with generally good yields via the assembly of simple starting materials, enaminones or nitroenamines, o-aminophenols, and cinnamaldehydes, in the presence of lactic acid in water–ethanol media. An
Photoinduced Three‐Component Cyclization of Arylamines, Enaminones and Difluorobromoacetates to 2,3‐Difunctionalized Quinolines
作者:Jie Huo、Xiao Geng、Wanmei Li、Pengfei Zhang、Lei Wang
DOI:10.1002/adsc.202200615
日期:2022.10.18
A photoinduced multicomponent reaction of arylamines, enaminones and difluorobromoacetates for the synthesis of 2,3-difunctionalized quinolines is reported. This strategy features broad functional groups tolerance and wide substrate scopes that enables further synthetic applications of the obtained products. Mechanistic studies reveal that intermolecular [3+3] cyclization between in-situ generated
An efficientAu(III)/Ag(I) co-catalytic platform has been established for the synthesis of cyclopentadienes through amine-release annulation of enaminones with alkynes. Vinylcarbenoids that were generated from 1,2-migration of propargyl esters may undergo a tandem annulation process with enaminones to give aminocyclopentenes as key intermediates. The bimetal catalytic system is compatible with a broad