A Convenient and Practical Synthesis of Coenzyme B12Enriched in13C in the Cobalt-Bound Carbon
摘要:
[A15-C-13]Adenosylcobalamin in which the labeled carbon is bound to the cobalt atom, and its analogs were synthesized from D-[5-C-13]ribose through anomeric hydroxyl activation, coupling with adenosines, and then alkylation of reduced B-12. The synthetic routes described here are mild, efficient, and proceed in reasonable yield.
Synthesis of {[A15-13C]5?-deoxy-N1-methyladenosylcobalamin+}Cl?
摘要:
The synthesis of {[A15-C-13] 5'-deoxy-N1-methyladenosylcobalamin(+)}Cl-, an analog of coenzyme B-12, was accomplished by glycosidation of [5-C-13]D-ribose with 4-pentenol, followed by benzoylation, coupling to N-6-benzoylaminopurine, deprotection, chlorination at C5', methylation at N1, and oxidative addition to reduced cobalamin. The alpha and beta anomers of the intermediate pent-4-enyl-erythro-furanosides were detected and quantified for the first time.