Reactivity of pyrrole pigments. Part 11¹ 1 Part 10. R. Caballol, J.M. Ribó, F.R. Trull, A. Vallès, Monatsh. Chem., in press.. On the structure of chrysins and other related bile pigments

Abstract:

The so-called chrysins described by Lemberg and Lockwood in 1939, which are obtained by treatment of biliverdin Zn++ complexes with alcoholic I2, are demonstrated to be 5'-(pyrrol-2-ylmethyl)-5(1H)-pyrromethenones. Mesobilipurpurin XIIIα dimethyl ester (619nm) described by Siedel and Fröwis in 1940, which was obtained by treatment of mesobiliverdin XIIIα dimethyl ester with nitric acid containing nitrogen oxides, is demonstrated to be 5-nitromesobiliverdin XIIIα dimethyl ester. According to Siedel's results and the already known fragmentation pathway of such nitro derivatives, the structure of tripyrrinone-14-carbaldehyde is proposed for bilipurpurins of the keto type. © 1987.

Año de publicación:

1987

Keywords:

Fuente:

scopus