作者:Kyongtae Kim、Jae Sang Yi
DOI:10.3987/com-02-9604
日期:——
3]thiazepino[3,2-a]benzimidazole 6,6-dioxide (1) with NaH (1.2 equiv.) for 30 min in THF at room temperature under nitrogen atmosphere, followed by addition of alkyl propiolate (4 equiv.) gave tetracyclic benzimidazole derivatives (7). Subsequent reactions of 7 with Na in p-xylene at reflux, followed by addition of HOAc at room temperature gave pentacyclic benzimidazole derivative (8) in good to excellent
7,12-二氢[5,6][1,3]噻氮杂[3,2-a]苯并咪唑6,6-二氧化物(1)用NaH(1.2当量)在THF中在室温下处理30分钟氮气氛,然后加入丙炔酸烷基酯(4当量)得到四环苯并咪唑衍生物(7)。随后,7 与 Na 在对二甲苯中回流反应,然后在室温下加入 HOAc,得到五环苯并咪唑衍生物 (8),收率良好。