36522-80-2

Dicyanocobyrinic acid heptamethyl ester may be used in the preparation of (5R,6R)-Coa,Coβ-dicyano-5,6-dihydro-5-hydroxy-heptamethylcob(III)yrinate-c,6-lactone, a derivative of cobyrinic acid heptamethyl ester.

Preparation of chloro derivatives of dicyanocobyrinic acid heptamethyl ester (′cobester′) is reported.