Ring transformations of 1,3-benzothiazine derivatives II conversion of 6α-aryl-7α-chloro-2,3(2′,3′-dialkqxybenzo)-1-thiaoctems3 into 2-carbomethoxy-3-aryl-7,8-dialkoxy-4.5-dihydro-1,4-benzothiazepines
作者:Lajos Fodor、János Szabó、Erzsébet Szúcs、Gábor Bernáth、Pál Sohár、József Tamás
DOI:10.1016/0040-4020(84)85090-5
日期:1984.1
6,7-Dialkoxy-2-aryl-4H1-1,3-benzothiazines (1a⇍) react with chloroacetyl chlorlde to give condensed β-lactam derivatives (2a⇍). Basic treatment of 2a⇍ in methanol led to the corresponding 1,4-banzothiazepine derivativee (3a⇍) viaring expansion. The structures of the products were determined by IR, NMR and MS studies
6,7-二烷氧基-2-芳基-4H1-1,3-苯并噻嗪(1a⇍)与氯乙酰氯反应生成缩合的β-内酰胺衍生物(2a⇍)。在甲醇中对2a +进行碱性处理会导致相应的1,4-banzothiazepinepinee(3a +)膨胀。产品的结构通过IR,NMR和MS研究确定