Asymmetric reduction with 5-deazaflavin. II. Synthesis of some chiral 5-deazaflavin derivatives.
作者:Kiyoshi TANAKA、Teiji KIMURA、Xing CHEN、Tetsuji KAWAMOTO、Fumio YONEDA
DOI:10.1248/cpb.38.312
日期:——
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.
为了开发功能性仿生辅酶模型,我们制备了一些新型手性 5-脱氮黄素衍生物。我们合成了在 C(6)位具有手性取代基(13)和在 C(5)位具有手性三级不对称碳中心的 5-脱氮黄素衍生物(15a、b、17a、b 和 18a、b),并取得了相当令人满意的收率。为了研究由此获得的模型的效率,我们用 15a、b 对苯甲酰甲酸乙酯进行了不对称还原的初步实验,结果发现不对称诱导的程度适中或较低。