Synthesis of 5-(4-Acetamidophenyl)-10,15,20-<i>tris</i>(4-Substituted Phenyl) Porphyrins using Dipyrromethanes
作者:Edgardo N. Durantini、Juana J. Silber
DOI:10.1080/00397919908085963
日期:1999.10
A convenient procedure for the synthesis of 5-(4-acetamidophenyl)-10,15,20-tris(4-substituted phenyl) porphyrins (5-8) from dipyrromethane is reported. meso-(4-Substituted phenyl) dipyrromethanes (1-4) were obtained in yields of 72-84% by the reaction of 4-substituted benzaldehyde with an excess of pyrrole. The porphyrins (5-8) were isolated with appreciable yields of 15-17%.
Correlations between functional porphyrin positions and accumulation in cancer cells
Porphyrin is accumulated in tumours due to its interaction with protein. Cancer therapy with porphyrin as a carrier molecule is attracting attention. Porphyrin displays two functional sites termed beta- and meso-positions. A correlation between the functional position on the porphyrin molecule and the ability to accumulate in cancer cells is observed in the present study. The accumulation of porphyrin derivatives was determined by measuring fluorescence intensity after incubation for 2 and 24 h. The accumulation of cancer cells depended on the position and length of functional groups. Estimated binding constants between porphyrin and bovine serum albumin suggest that the position of functional groups leads to changes in binding affinity and influences the accumulation of porphyrin derivatives in cancer cells.
Novel 5-benzazolyl-10,15,20-triphenylporphyrins and β,meso-benzoxazolyl-bridged porphyrin dyads: Synthesis, characterization and photophysical properties
作者:Satyasheel Sharma、Mahendra Nath
DOI:10.1016/j.dyepig.2011.07.022
日期:2012.3
Novel 5-benzazolyl-10,15,20-triphenylporphyrins and beta,meso-benzoxazole-linked diporphyrins were synthesized through La(OTf)(3) catalyzed reaction of newly prepared 5-(3,4-diam nophenyl)-10,15,20-triphenylporphyrin or 5-(3-amino-4-hydroxyphenyl)-10,15,20-triphenylporphyrin with aromatic aldehydes in 1,2-dichlorobenzene. On metalation with zinc acetate, freebase beta,meso-benzoxazole-linked diporphyrin was successfully converted to the Zn-Zn diporphyrin complex in good yield. The synthesized porphyrin analogues were characterized using electronic absorption, IR and H-1 NMR spectroscopy in addition to mass and elemental analyses. The fluorescence studies of 5-benzazolyl-10,15,20-triphenylporphyrins showed efficient intramolecular energy transfer from the pyrene and fluorene subunits to the porphyrin core. In addition, the fluorescence quenching observed in beta-meso-benzoxazolyl-bridged porphyrin dyads was attributed to the possible nonplanarity of it component of the diporphyrins. The freebase-Ni diporphyrin complex underwent strong emission quenching in comparison to that of freebase diporphyrin and dizinc diporphyrin analogues. (C) 2011 Elsevier Ltd. All rights reserved.
LINDSEY, JONATHAN S.;BROWN, PHILIP A.;SIESEL, DAVID A., TETRAHEDRON, 45,(1989) N5, C. 4845-4866
作者:LINDSEY, JONATHAN S.、BROWN, PHILIP A.、SIESEL, DAVID A.