Sodium borohydride → HCID 67751644, compound

Participants

Reaction Steps

To a solution of 2-(diphenylmethyl)-1-ethoxycarbonylpyrrolidin-3-one (Example 1c, 5.75 g, 18 mmol) in ethanol (50 ml) was added sodium borohydride (1.00 g, 26 mmol) and the mixture was stirred under nitrogen for 60 h at room temperature. The reaction mixture was partitioned between 10% citric acid/ethyl acetate, the organic phase washed with saturated brine and dried (MgSO4). The solvent was removed in vacuo and the residue chromatographed on silica gel using ethyl acetate/hexane (2:3) as eluant. Recrystallisation from ethyl acetate/hexane gave cis-2-(diphenylmethyl)-3-hydroxy-1-ethoxycarbonylpyrrolidine, m.p.=104°-105° C. 1H NMR (360 MHz, CDCl3) δ7.00-7.50 (10H, m), 4.78 (1H, dd, J=9 Hz and J=7 Hz), 4.46 (1H, dd, J=8.0 Hz and J=7.0 Hz), 4.32 (1H, d, J=9 Hz), 3.83 (2H, m), 3.47 (2H, m), 3.31 (1H, m), 2.10 (1H, m), 1.95 (1H, m), 1.00 (3H, t, J=7.0 Hz).

Provenance & Evidence