| Abstract
| - The behavior of porphyrins as dipolarophiles in 1,3-dipolar cycloadditions with azomethine ylideswas studied. Depending on the nature of the substituent groups on the porphyrin macrocycles, thereaction can give monoadducts (chlorins) or bisadducts (isobacteriochlorins and bacteriochlorins).When a large excess of azomethine ylide is used, trisadducts can also be obtained. Mixedisobacteriochlorin derivatives were prepared from the reaction of azomethine ylides with the chlorinmonoadducts previously obtained via Diels−Alder reactions.
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