Sulfolenoporphyrins: synthons for refunctionalization of porphyrins
摘要:
Using sulfolenopyrroles (4) and (11) methods are developed for the synthesis of opp- (15,18,19) and adj- (25) bis-sulfolenoporphyrins,- such compounds are useful building blocks for the refunctionalization of the porphyrin system, and readily undergo Diels-Alder cycloaddition reactions. (C) 2005 Elsevier Ltd. All rights reserved.
Stacked Porphyrin Arrays from Hydrogen-Bonded Porphyrin–Resorcinol 1D Chains
作者:Toshihiro Tanaka、Ken Endo、Yasuhiro Aoyama
DOI:10.1246/bcsj.74.907
日期:2001.5
The Ni(II) complex of monoresorcinol derivative of a sterically unhindered tetraalkylporphyrin (3) affords adducts 3•(methanol) and 3•1.5(acetophenone). In the crystals, porphyrin 3 forms hydrogen-bonded (O–H···O–H) polyresorcinol chains with the porphyrin residues sticking out of the chains. The chains are self-assembled in such a manner as to give closely stacked interchain porphyrin columns, while the guest molecules are either firmly bound to the hydrogen-bonding sites (in the case of methanol) or incorporated in the channels running in parallel with the porphyrin stacks (in the case of acetophenone). The formation of such a stacked porphyrin array is not observed when the guest is changed to 4-heptanone or when the porphyrin is changed to a sterically hindered one 4 or 5 with full substitution at the meso- or the β-positions. The mode of interchain porphyrin stacking is discussed in light of the crystal structures of adducts 3•(4-heptanone), 4•pyridine, and 5•(2-nonanone).
Synthesis of 5-(4-X-Phenyl)-10,15,20-tris(Substituted Phenyl) Porphyrins Using Dipyrromethanes
作者:Edgardo Durantini
DOI:10.3390/60600533
日期:——
5-(4-X-Phenyl)-10,15,20-tris(substitutedphenyl) porphyrins (4-6) were synthesized from meso-(substitutedphenyl) dipyrromethanes (1-3), which in turn were prepared in yields of 75-92 %. This synthetic pathway was compared with the binary mixed aldehyde and pyrrole condensation method. The reported dipyrromethane approach is advantageous for porphyrins substituted by –OCH3 (4) and -F (6) groups (12-14
One step synthesis of sapphyrin and N-confused porphyrin using dipyrromethane
作者:Seenichamy Jeyaprakash Narayanan、Bashyam Sridevi、Alagar Srinivasan、Tavarekere K. Chandrashekar、Raja Roy
DOI:10.1016/s0040-4039(98)01603-7
日期:1998.10
Reaction of dipyrromethane in trifluoroacetic acid produces sapphyrin while the same reaction in toluene p-sulfonic acid gave N-confused porphyrin.
二吡咯甲烷在三氟乙酸中的反应生成了沙弗林,而在甲苯对磺酸中的相同反应则得到了N稠合的卟啉。
Use of orthoesters in the synthesis of meso-substituted porphyrins
作者:Simon Fox、Robert Hudson、Ross W. Boyle
DOI:10.1016/s0040-4039(02)02826-5
日期:2003.2
orthoesters, trimethyl orthoacetate and trimethyl orthobenzoate, in the synthesis of porphyrins from 5-phenyldipyrromethanes is described. Previously unreported 5,15-diphenyl-10,20-dimethyl porphyrins can be accessed conveniently by this route. A relationship between the steric bulk of the orthoester and the amount of scrambling of the porphyrin products has been found. Strong electron-withdrawing substituents