Table 1. Reaction conditions for the photoredox/enzyme catalysis cascade a .
| |||
Entry | Biocatalyst | t/h | Yield [e.e.] (%) b |
1 | E. coli (MAO-N-9) whole cell/180 mg | 20 | 92 [91] |
2 | E. coli (MAO-N-9) whole cell/180 mg | 30 | 92 [>99] |
3 | — | 10 | 95 [0] |
4 | E. coli (empty) whole cell/120 mg | 20 | >95 [0] |
5 | E. coli (MAO-N-9) lysate/180 mg | 20 | 83 [77] |
aReaction conditions: 1a (10 mM), Na3[Ir(sppy)3] (0.1 mM), AscH2 (200 mM), biocatalyst (180 or 120 mg, wet weight of cell pellets) in 1.0 mL phosphate buffer solution (pH 8.0) at ambient temperature with 405 nm LED (3 W) irradiation on a shaking agitator (at 200 rpm) under air.
bYields were determined by 1H NMR analysis, enantiomeric excess was determined by GC on a chiral stationary phase (see ESI for details).