Elemental Sulfur Promoted Cyclization of Aryl Hydrazones and Aryl Isothiocyanates Yielding 2-Imino-1,3,4-thiadiazoles
作者:Tan N. Huynh、Khanh T. N. Ong、Phuong T. Dinh、Anh T. Nguyen、Tung T. Nguyen
DOI:10.1021/acs.joc.3c02675
日期:2024.3.1
method for using elemental sulfur to facilitate the cyclization of aryl hydrazones and aryl isothiocyanates, affording biorelated 2-imino-1,3,4-thiadiazoles. Reactions progressed in the presence of elemental sulfur, N-methylmorpholine base, and DMSO solvent, while were tolerant of a wide range of functionalities including halogen, nitro, cyano, methylsulfonyl, and heterocyclic groups. The method appears
我们报道了一种使用元素硫促进芳基腙和芳基异硫氰酸酯环化的方法,得到生物相关的2-亚氨基-1,3,4-噻二唑。反应在元素硫、 N-甲基吗啉碱和 DMSO 溶剂存在下进行,同时能够耐受多种官能团,包括卤素、硝基、氰基、甲基磺酰基和杂环基团。该方法似乎提供了使用简单、廉价且稳定的试剂在相对温和的条件下提供三芳基取代的2-亚氨基-1,3,4-噻二唑的通用途径。