Herein we report the stereoselective synthesis of new chiral NADH mimics 2 and 13 of the benzo [b]-1,6-naphthryridine series. The synthesis of 2 and 13 relies upon a Friedlander-type condensation between the amino imine 3 and the piperidine-2,4-dione 4 bearing a stereogenic center at C(6). The resulting NADH models were involved in the reduction of methyl benzoylformate. A comparison of their performance with that of previously reported NADH mimics such as model 1, throws now light on the role played by the C(4) C(3)-C-O dihedral angle (alpha) on the stereoselectively of the hydride transfer. (C) 2002 Elsevier Science Ltd. All rights reserved.
Chiral biomimetic NADH models in the benzo[b]-1,6-naphthyridine series. A novel class of stable, reactive and highly enantioselective NADH mimics
作者:J Vasse
DOI:10.1016/s0040-4020(03)00706-3
日期:2003.6.23
The preparation of a new class of tricyclic models 1 based on a Friedländer reaction between chiral piperidine-2,4-diones 2 and azomethine 3 is reported. Alkylation of the lactam allowed to install various pendant arms on the chiral cyclic inducer. The so-obtained mimics 1a,d,f,g,h,k were involved in the reduction of methyl benzoylformate to furnish methyl mandelate in 4–87% ee (R). The presence of