title: A rapid and efficient access to diaryldibenzo[b,f][1,5]diazocines.
abstract: 2-Benzoylbenzoyl azides undergo facile cyclization under acidic conditions to give substituted dibenzo[b,f][1,5]-diazocines in good yields. This approach shortens the synthetic steps toward these compounds as compared with conventional methods. The mechanism of the diazocine synthesis is assumed to proceed by an unprecedented intermolecular [2 + 2] cyclization.
authors.affiliation: Qingdao Insitute of Bioenergy & Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shangdong Province, China 266101.
authors.forename: Xiao
authors.initials: X
authors.lastname: Wang
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Li
authors.forename: Na
authors.initials: N
authors.lastname: Zhao
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Wan
mesh_terms: D001386:Azides / Q000737:chemistry*; D001392:Azocines / Q000138:chemical synthesis* / Q000737:chemistry; D001577:Benzophenones / Q000737:chemistry*; D002384:Catalysis; D003500:Cyclization; D015394:Molecular Structure
chemical_list: D001386:Azides; D001392:Azocines; D001577:Benzophenones; C556700:2-benzoylbenzoic acid