Tetrahedron Letters p. 7177 - 7180 (1996)
Update date:2022-09-26
Topics:
Nguyen, Liem T.
Smith, Kevin M.
Treatment of 2-[(N,N-dialkylamino)methyl]pyrrole-5-carboxylic acids (e.g. 10,12 or 11,13) in methanol with K3Fe(CN)6 gives type-I porphyrins (etioporphyrin-I 7, coproporphyrin-I tetramethyl ester 16, respectively); with pyrroles 10,12 the product 7 is contaminated with about 8% of other type-isomer(s).
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