Synthesis of 1- and 5-Aryl-2,4-benzothiazepines. 25th Communication on Seven-membered Heterocycles
作者:John B. Bream、Jean Schmutz
DOI:10.1002/hlca.19770600840
日期:1977.12.14
which readily reacted with water or alcohols to form 3, were cyclized with Na2CO3 in anhydrous acetone to yield 5-aryl-2,4-benzothiazepines 5, 6 and 7, but the 2′-chlorophenyl-derivative 21 exceptionally cyclized to the cyclobutene 20. The 1-aryl-2,4-benzothiazepines 14, 15 and 16 were prepared unequivocally by acid-catalysed cyclizations of thioureas 13 and 19.
α-芳基-邻-二甲苯基二溴化物1与硫脲反应,得到单-异硫脲鎓盐2,在某些情况下形成双-异硫脲鎓盐4作为副产物。易与水或醇反应形成3的化合物2在无水丙酮中与Na 2 CO 3环合,生成5-芳基-2,4-苯并噻氮杂5、6和7,但2'-氯苯基衍生物21异常环化成环丁烯20。1-芳基-2,4-苯并硫氮杂卓14、15和16通过酸催化的硫脲13和19的环化反应明确制备了这些化合物。