Partial syntheses of messel oil shale bacteriopetroporphyrins from the bacteriochlorophylls-d
Abstract
Chemical degradation of the natural bacteriochlorophyll-d homologous mixture to give the corresponding bacteriopetroporphyrin methyl esters is described; 1H n.m.r. spectroscopy of the nickel(II) complexes is used to establish that the pigments are identical with those isolated from immature Messel oil shale.
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