Asymmetric N-Heterocyclic Carbene Catalyzed Annulation of 2-Alkenylbenzothiazoles with α-Chloro Aldehydes
摘要:
Diastereo- and enantioselective N-heterocyclic carbene catalyzed 1-azadiene Diels-Alder reactions of (E)-2-styrylbenzothiazoles with alpha-chloro aldehydes are reported. This annulation strategy provides an efficient access to medicinally important dihydrobenzothiazolopyridin-1-ones in good to excellent yields (44-97%) with very good to excellent stereoselectivities (up to 9: 1 dr, 98% ee) and tolerates quite a range of substituents.
Diastereo- and enantioselective N-heterocyclic carbene catalyzed 1-azadiene Diels-Alder reactions of (E)-2-styrylbenzothiazoles with alpha-chloro aldehydes are reported. This annulation strategy provides an efficient access to medicinally important dihydrobenzothiazolopyridin-1-ones in good to excellent yields (44-97%) with very good to excellent stereoselectivities (up to 9: 1 dr, 98% ee) and tolerates quite a range of substituents.
Cu-Catalyzed, electron-relayed three-component synthesis of 2-alkenylbenzothiazoles with cathodic ammonia evolution
作者:Chengxian Hu、Dan Wang、Lu Wang、Ying Fu、Zhengyin Du
DOI:10.1039/d3gc03884j
日期:——
A CuI-catalyzed, one-pot, three-component reaction of benzaldehydes, 2-aminobenzothiol and malononitrile is described, wherein CuI plays an electron relay. The method features simplified operation, highly atom economy, and mild reaction conditions.
介绍了一种 CuI 催化的苯甲醛、2-氨基苯硫醇和丙二腈的一锅三组分反应,其中 CuI 起着电子中继的作用。该方法具有操作简单、原子经济性高和反应条件温和等特点。