Factor F430 from Methanogenic Bacteria: Absolute Configuration Experiments on F430M ( 2 ) aiming at a potentially biomimetic, reductive reconstruction of the F430 ( 1 ) chromophore from corresponding pyrrocorphinate intermediates provided us with F430 derivatives which contain an isobacteriochlorinate chromophore system similar to the one occurring in sirohydrochlorin ( 3 ) ( cf. the Scheme ). Comparison of their CD spectra with the‐CD spectrum of nickel( II )‐sirohydrochlorinate octamethyl ester demonstrates that the absolute configurations of factor F430 and sirohydrochlorin in the region of rings A and B are the same.
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Fässler et al. (1985) studied this question.
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