63723-86-4Relevant academic research and scientific papers
Reaction of 1,2-Dimethoxybiphenylene with Dichlorocarbene. Chemical Detection of the Bond Fixation in Biphenylene Derivatives
Sato, Masaru,Inaba, Keiko,Ebine, Seiji,Tsunetsugu, Josuke
, p. 2334 - 2339 (2007/10/02)
1,2-Dimethoxybiphenylene reacted with dichlorocarbene to give three chloro(methoxy)-6H-benzo-cyclobutacyclohepten-6-one derivatives, two chloro(methoxy)fluorenones and two dimethoxyfluorenones.The reaction with dibromocarbene gave similar products.The formation of these products serves an unequivocal chemical evidence for bond fixation of 1,2-dimethoxybiphenylene.The chloro(methoxy)-6H-benzocyclobutacyclohepten-6-one was led to 9-chloro-5-hydroxy-6H-benzocyclobutacyclohepten-6-one, the first tropolone analogue of biphenylene.This compound was shown to exist in only one of the two possible tautomers in contrast with general monocyclic tropolones.
