Porphyrin Synthesis in Surfactant Solution: Multicomponent Assembly in Micelles
摘要:
A synthesis of meso-substituted porphyrins in anionic sodium dodecyl sulfate micelles has been developed. Polar, functionalized aromatic aldehydes condense reversibly with pyrrole in the micellar phase. Oxidation of the porphyrinogen then provides functionalized porphyrins in yields of 10-48%. Hydrophobic aldehydes condense irreversibly to give low yields at practical substrate concentrations. Synthesis in D2O solution results in per-beta-deuterated porphyrins. A two-phase model is used to rationalize the dependence of porphyrin yield on reactant and surfactant concentration. Micelles are viewed as potential wells which promote porphyrinogen assembly by binding products more tightly than reactants.
Synthesis of Benzodioxepinone Analoguesvia a Novel Synthetic Route with Qualitative Olfactory Evaluation
作者:Britta Drevermann、Anthony R. Lingham、Helmut M. Hügel、Philip J. Marriott
DOI:10.1002/hlca.200790085
日期:2007.5
benzodioxepinone structure (Scheme 1, Table 3). In light of the difficulty experienced in applying patented literature to deriving the analogues 12–18, particularly those with electron-withdrawing substituents, an alternative synthetic scheme was implemented for the construction of all analogues in favorable yields (Scheme 4, Table 3). Formation of the hydroxy-protected dihalo alkylating agent 24via epoxide cleavage
Efficient Synthesis of meso-Substituted Corroles in a H<sub>2</sub>O−MeOH Mixture
作者:Beata Koszarna、Daniel T. Gryko
DOI:10.1021/jo060007k
日期:2006.5.1
of various reaction parameters (cosolvent, reagent, and acid concentration), high yields of bilanes were obtained. Additionally, the bilane derivedfrom 4-cyanobenzaldehyde was isolated, and the oxidative macrocyclization reaction was performed under various reaction conditions (different solvents, different concentrations, and various oxidants). As a result, triphenylcorrole was obtained in the highest
Evaluation of a<sup>99m</sup>Tc-labelled<i>meso</i>-bisphenylporphyrin as a tumour image agent
作者:Pedro M. Santos、Mafalda Laranjo、Arménio C. Serra、Ana Margarida Abrantes、Marta Piñeiro、João Casalta-Lopes、Diná Trindade、Jorge Maia、António Rocha-Gonsalves、Maria Filomena Botelho
DOI:10.1002/jlcr.3180
日期:2014.3
55 ± 1.29 in WiDr-bearing tumours mice and in H1299-bearing tumours mice, respectively, 6 h post-injection, showing the tumour specificity of the (99m) Tc-2CPP complex. The favourable tumour/muscle ratio of (99m) Tc-2CPP shows that this complex could potentially be used as tumourimagingagent. Moreover, it could be used to follow the progression or regression of tumours before, during and after the
Porphyrin Synthesis in Surfactant Solution: Multicomponent Assembly in Micelles
作者:Richard P. Bonar-Law
DOI:10.1021/jo9600161
日期:1996.1.1
A synthesis of meso-substituted porphyrins in anionic sodium dodecyl sulfate micelles has been developed. Polar, functionalized aromatic aldehydes condense reversibly with pyrrole in the micellar phase. Oxidation of the porphyrinogen then provides functionalized porphyrins in yields of 10-48%. Hydrophobic aldehydes condense irreversibly to give low yields at practical substrate concentrations. Synthesis in D2O solution results in per-beta-deuterated porphyrins. A two-phase model is used to rationalize the dependence of porphyrin yield on reactant and surfactant concentration. Micelles are viewed as potential wells which promote porphyrinogen assembly by binding products more tightly than reactants.
Refined Synthesis of<i>meso</i>-Substituted<i>trans</i>-A<sub>2</sub>B-Corroles Bearing Electron-Withdrawing Groups
作者:Daniel T. Gryko、Beata Koszarna
DOI:10.1055/s-2004-829179
日期:——
conversion to corroles, we were able to improve yields from ca. 6 to ca. 20% for a broad range of aldehydes. We proved that these conditions work well also for dipyrromethanes possessing cyano and nitro groups. meso-Substituted alkyl aryl corrole has been obtained for the first time using this procedure.