Silver-mediated thio-acetoxylation and TFA triggered cyclization of amino disulfides with unactivated alkenes: synthesis of 3-aryl/alkyl-1,4-benzothiazines
作者:Ch. Durga Prasad、Ajay Verma、Moh. Sattar、Sangit Kumar
DOI:10.1039/c5ra12995h
日期:——
developed. This reaction proceeds via 1,2-thioacetoxylation of an alkene with silver acetate and acetic acid as an additive, followed by cyclization using TFA. The addition of alkene took place in a regioselective manner, forming exclusively one regioisomer, which was confirmed by a single crystal X-ray study. Various differently substituted alkenes, such as aromatic and aliphatic olefins, were coupled with
已经开发了合成3-芳基/烷基-1,4-苯并噻嗪的方便策略。该反应通过烯烃与乙酸银和乙酸作为添加剂的1,2-硫代乙酰氧基化反应进行,然后使用TFA进行环化。烯的添加以区域选择性的方式进行,仅形成一种区域异构体,这通过单晶X射线研究得到证实。将各种不同取代的烯烃(例如芳族和脂族烯烃)与氨基二硫化物偶联,形成苯并噻嗪衍生物的文库。