Asymmetric Reduction with 5-Deazaflavin. II. : Synthesis of Some Chiral 5-Deazaflavin Derivatives

Abstract

For the purpose of development of functional biomimetic coenzyme models, we prepared some new types of chiral 5-deazaflavin derivatives. Syntheses of 5-deazaflavin derivatives possessing a chiral substituent at the C(6) position, (13), and a chiral tertiary asymmetric carbon center at C(5) (15a, b, 17a, b, and 18a, b) were achieved in rather satisfactory yield. Preliminary experiments on asymmetric reduction of ethyl benzoylformate with 15a, b were carried out in order to investigate the efficiency of the models thus obtained, resulting in moderate or low asymmetric induction.