A Green Approach to 2-Substituted Benzo- and Naphthothiazoles via N-bromosuccinimide/Bromide-Mediated C(aryl)-S Bond Formation
作者:Ainka T. Brown、Nadale K. Downer-Riley
DOI:10.3390/molecules27227876
日期:——
coupling of isothiocyanates with amines under mild conditions using N-bromosuccinimide/tetrabutylammonium bromide in 1,2-dimethoxyethane (DME) under ambient conditions. The reactions produce moderate to excellent yields with good functional group tolerance and avoid the use of harsh thermal conditions, corrosive reagents, halogenated solvents, toxic metal salts, and expensive metal catalysts, and are amenable
2-取代的苯并噻唑和萘并噻唑已通过苯基硫脲和活化的硫代苯甲酰苯胺的分子内环化或异硫氰酸酯与胺在温和条件下在环境条件下在 1,2-二甲氧基乙烷 (DME) 中使用N-溴代琥珀酰亚胺/四丁基溴化铵进行分子内环化而方便地制备。该反应产生中等至优异的产率,具有良好的官能团耐受性,避免使用苛刻的热条件、腐蚀性试剂、卤化溶剂、有毒金属盐和昂贵的金属催化剂,并且适用于克级制备。