Synthesis of 4,10-dihydro-4,10-dioxo-1<i>H</i>[1]benzothiopyrano[3,2-<i>B</i>]pyridine and 7-oxo-7,13-dihydro[1]benzothiopyrano[2,3-<i>b</i>]-1,5-benzodiazepine
作者:Hiroyuki Nakazumi、Takashi Endo、Toshiyuki Nakaue、Teijiro Kitao
DOI:10.1002/jhet.5570220123
日期:1985.1
and with dimethyl acetylenedicarboxylate gave intermediates, which were thermally cyclized to give 4,10-dihydro-4,10-dioxo-1H[1]benzothiopyrano[3,2-b]pyridinecarboxylates. 3-Formyl-thiochromone was condensed with o-phenylenediamine to give 7-oxo-7,13-dihydro[1]benzothiopyrano[2,3-b]-1,5-benzodiazepine.
通过使3-溴-硫代色素-4-酮与叠氮化钠在甲醇-水中反应,可轻松制得3-氨基-4 H -1-苯并噻喃-4-酮(3-氨基噻吩酮)。3-氨基硫代色酮与乙氧基亚甲基丙二酸二乙酯和乙酰二羧酸二甲酯缩合,得到中间体,将其热环化得到4,10-二氢-4,10-dioxo-1 H [1]苯并硫代吡喃并[3,2- b ]吡啶羧酸酯。将3-甲酰基-硫代色酮与邻苯二胺缩合,得到7-氧代-7,13-二氢[1]苯并硫代吡喃并[2,3 - b ] -1,5-苯并二氮杂。