714951-81-2Relevant academic research and scientific papers
Synthesis of functionalized unsymmetrical thiophene diols and their use in the synthesis of cis-21-monothia- and cis-21,23-dithiaporphyrin building blocks with two different functional groups
Punidha, Sokkalingam,Ravikanth, Mangalampalli
, p. 2199 - 2203 (2005)
A series of functionalized unsymmetrical thiophene diols were synthesized and used for the synthesis of cis-21-monothia and cis-21,23-dithiaporphyrin building blocks having two different functional groups at meso-positions. To show the use of the cis-thia
Synthesis of covalently linked unsymmetrical porphyrin pentads containing three different porphyrin subunits
Rai, Smita,Ravikanth, Mangalampalli
supporting information; experimental part, p. 8364 - 8375 (2009/04/11)
(Chemical Equation Presented) The tetrafunctionalized AB3-type porhyrin building blocks containing two different types of functional groups with N4, N3O, N3S, and N2S 2 porphyrin cores were
One-flask synthesis of mono- and trifunctionalized 21-thia and 21-oxaporphyrin building blocks and their application in the synthesis of covalent and noncovalent unsymmetrical porphyrin arrays
Gupta, Iti,Ravikanth, Mangalampalli
, p. 6796 - 6811 (2007/10/03)
A rapid synthetic route has been developed to synthesize mono- and trifunctionalized 21-thia and 21-oxaporphyrin systems using simple precursors such as 2[α-(aryl)-α-hydroxvmethyl] thiophene (thiophene mono-ol) and 2[α-(aryl)-α-hydroxvmethyl] furan (furan mono-ol), respectively. Condensation of one equivalent of thiophene or furan mono-ol with two equivalents of aryl aldehyde and three equivalents of pyrrole under porphyrin forming conditions followed by column chromatography resulted in functionalized 21-thia or 21-oxaporphyrins. To synthesize monofunctionalized porphyrins, the mono-ol containing the functionalized aryl group was used. The functionalized aldehydes were used to synthesize trifunctionalized porphyrins. The mono-ol method is versatile and applicable to synthesize mono- and trifunctionalized 21-thia and 21-oxaporphyrins containing functional groups such as iodophenyl, ethynylphenyl, hydroxyphenyl, bromophenyl, and pyridyl groups. The monofunctionalized porphyrin building blocks containing iodophenyl and ethynylphenyl groups were used further to synthesize four unsymmetrical covalent porphyrin dimers containing two different porphyrin cores such as N 3S-N4, N3O-N4, and N 3S-N3O bridged via diaryl ethyne group and one symmetrical phenylethyne bridged dimer containing two N3S cores. A preliminary photophysical study on these dimers indicated a possibility of energy transfer from one subunit to another. We also demonstrated the use of trifunctionalized porphyrins in the synthesis of two noncovalent unsymmetrical porphyrin tetramers containing one N3S and three N4 porphyrin subunits.
