Synthesis and Antimicrobial Activity of Some Pyrrolo[1,2,3-de]-1,4-benzothiazines, Part 2
作者:Domenico Armenise、Giuseppe Trapani、Francesca Stasi、Flaviano Morlacchi
DOI:10.1002/(sici)1521-4184(199802)331:2<54::aid-ardp54>3.0.co;2-6
日期:1998.2
Acid catalyzed cyclization reactions of both 3‐alkyl‐ and 3‐aryl‐substituted N‐/2,2‐dialkoxyethyl)‐3,4‐dihydro‐2H‐1,4‐benzothiazines (2) lead to 2,3‐dihydro‐pyrrolo[1,2,3‐de]‐1,4‐benzothiazines (3). The pyrrolobenzothiazine structure was deduced on the basis of 2D 1H NMR‐NOESY experiments and fully determined by X‐ray data. Compounds 3a‐c showed poor antibacterial activity. However, the 3‐phenyl‐N‐(2
3-烷基-和3-芳基-取代的N-/2,2-二烷氧基乙基)-3,4-二氢-2H-1,4-苯并噻嗪(2)的酸催化环化反应生成2,3-二氢-吡咯并 [1,2,3-de] -1,4-苯并噻嗪 (3)。吡咯并苯并噻嗪结构是基于2D 1H NMR-NOESY实验推导出来的,并由X射线数据完全确定。化合物3a-c显示出较差的抗菌活性。然而,3-苯基-N-(2,2-二甲氧基乙基)-3,4-二氢-2H-1,4-苯并噻嗪(2b')对黑曲霉的抗真菌活性是咪康唑的16倍。