Copper-catalyzed N H/S H functionalization: A strategy for the synthesis of benzothiadiazine derivatives
摘要:
A copper-mediated N-S bond-forming reaction via N-H/S-H activation is described. This reaction occurs under mild conditions with high efficiency, step economy, and tolerates a wide variety of functional groups, providing an efficient means of accessing biologically important 1,2,4-benzothiadiazin-3(4H)-ones. (C) 2017 Elsevier Ltd. All rights reserved.
Iodine-mediated oxidative N–S bond formation: a facile one-pot synthetic approach to 1,2,4-benzothiadiazine 1,1-dioxides under transition metal-free conditions
作者:Sümeyye Buran Uğur、Şengül Dilem Doğan
DOI:10.1080/17415993.2022.2164693
日期:——
Benzothiadiazine 1,1-dioxide derivatives are widely used because of their diverse biological activities and medicinal prospects. In this study, iodine-oxone mediated oxidative N–S bond formation reaction was described. This new and transition-metal-free approach allows for the convenient synthesis of a variety of 1,2,4-benzothiadiazine 1,1-dioxides from readily available urea derivatives under very mild conditions
We reported a versatile protocol to chemodivergently construct significant heterocyclic scaffolds of benzothiadiazin-3-one 1-oxides and benzisothiazol-3-ones by visible light-promoted photocatalysis. This substrate-dependent chemoselective strategy enables N-(2-mercaptophenyl)-N’-substituted ureas through the N–S bond coupling/oxidation cascade to selectively produce benzothiadiazin-3-one 1-oxides;