Phosphorus tetraphenylporphyrin

It is known that thiophenes react with singlet oxygen forming endoperoxides, which are thiaozonides, and whose thermal reactions have been investigated. A novel reaction of acylthiophene endoperoxides 213 (photosensitized oxidation with tetraphenylporphyrine at —30 °C) involves their treatment with triphenylphosphine. The nucleophilic attack finally leads to a furan derivative 214 by elimination of O and S atoms bound to phosphorus (Scheme 71) <1995TL7431, 1998JA8914>. 

The luminescence of phosphorus(v) tetraphenylporphyrins such as meso-5,10,15,20-tetraphenylporphine has been examined, and a detailed study of the photodarkening of amorphous AS2S3 has appeared. ... 

Finally a new departure in an unusual aspect of hypervalent phosphorus chemistry has been provided by the synthesis of water-stable dialkoxy phosphorus(V)-tetraphenylporphyrins (125) from (124). The six-co-ordinate phosphorus porphyrin (125) with R=Et, has... 

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