COMBER, MARK F.;SARGENT, MELVYN V., J. CHEM. SOC. PERKIN TRANS. PT 1,(1990) N, C. 1371-1373
作者:COMBER, MARK F.、SARGENT, MELVYN V.
DOI:——
日期:——
The synthesis of pacharin: a dibenzoxepine from the heartwood of Bauhinia racemosa Lamk.
作者:Mark F. Comber、Melvyn V. Sargent
DOI:10.1039/p19900001371
日期:——
The synthesis of the novel dibenzoxepine derivative pacharin (13)(8-methoxy-7-methyldibenz[b,f]-oxepine-1,6-diol), a constituent of the heartwood of BauhiniaracemosaLamk., is described The route depended on the formation of the diphenyl ether (8) which was converted by standard synthetic steps into the bisphosphonium salt (11). The derived bis-ylide underwent oxidative cyclization to the dibenzoxepine