Synthetic and biosynthetic studies of porphyrins. Part 9. Synthesis of isocoproporphyrin, dehydroisocoproporphyrin, and de-ethylisocoproporphyrin
作者:Anthony H. Jackson、Timothy D. Lash、David J. Ryder
DOI:10.1039/p19870000287
日期:——
The title compounds, which were excreted by patients suffering from porphyria cutanea tarda or rats poisoned with hexachlorobenzene have been synthesized by the b-oxobilane route. Isocoproporphyrin tetramethyl ester (7a) was prepared from pyrromethanes corresponding to rings DA and BC of the macrocycle, and the de-ethyl analogue (7b) was prepared in a similar fashion; acetylation of the latter followed
Synthetic and biosynthetic studies of porphyrins. Part 8. Syntheses of hepta-, hexa-, and penta-carboxylic porphyrins related to uroporphyrin-I
作者:Anthony H. Jackson、Damrus Supphayen
DOI:10.1039/p19870000277
日期:——
The title porphyrins, of interest as abnormal metabolites in porphyrin biosynthesis, have been synthesized by the Fischer, and b-oxobilane routes, and compared with the naturally derived materials. Enzymic experiments have shown that the conversion of uroporphyrinogen-I into coproporphyrinogen-I both in vivo and in vitro is non-specific and occurs by both possible pathways via the two intermediate