42523-09-1Relevant articles and documents
Sato et al.
, p. 2151 (1977)
Tricyclic polyhydroxylic tyrosine kinase inhibitors
-
, (2008/06/13)
Certain tricyclic polyhydroxylic compounds, and their pharmaceutically-acceptable salts, are inhibitors of tyrosine kinase enzymes, and so are useful for the control of tyrosine kinase dependent diseases (e.g., cancer, atherosclerosis).
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.