Cruciform porphyrin pentamers 15 and 16 are obtained in good yield by acid-catalyzed tetramerization of ZnII-pyrroloporphyrin 14, followed by oxidation with DDQ; pyrroloporphyrins are in turn obtained from the corresponding pyrrolochlorins by Diels-Alder type reactions of porphyrins involving thermal extrusion of sulfur dioxide from a pyrrole-fused 3-sulfolene.
|Original language||English (US)|
|Number of pages||2|
|State||Published - Nov 7 1998|
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