作者:YON-HIN, PAUL、WIJESEKERA, TILAK P.、DOLPHIN, DAVID
DOI:——
日期:——
YON-HIN, PAUL;WIJESEKERA, TILAK;DOLPHIN, DAVID, CAN. J. CHEM., 68,(1990) N0, C. 1867-1875
作者:YON-HIN, PAUL、WIJESEKERA, TILAK、DOLPHIN, DAVID
DOI:——
日期:——
US4774339A
申请人:——
公开号:US4774339A
公开(公告)日:1988-09-27
Transformation of a monovinylporphyrin to benzoporphyrins via Diels-Alder adducts
作者:Paul Yon-Hin、Tilak P. Wijesekera、David Dolphin
DOI:10.1016/s0040-4039(01)93324-6
日期:——
β-unsubstituted-β′-vinylporphyrin has been synthesized which reacted with an excess of acetylenedicarboxylate ester to give monobenzoporphyrins in high yield. Evidence that suggests an isomerization of the initial adduct to a new porphyrin enroute to the benzoporphyrin is presented.
The use of 1-bromo-19-methylbiladienes-ac in the synthesis of vinylporphyrins is described. The effect of the vinyl precursors on the reactions of the dipyrromethene intermediates and the construction of the linear tetrapyrrole are discussed. High-yield syntheses of a methylvinylporphyrin, an H-vinyl analogue, as well as two A,C-divinylporphyrins are presented. Keywords: pyrrole, dipyrromethene, acetoxyethylpyrrole