Sodium Bicarbonate → HCID 101934793, compound

Participants

Reaction Steps

p-Nitrobenzyl (5R,6S)-6[(1R)-1-hydroxyethyl]-2-(5-methyl-1-phenylpyrazol-3-yl)carbapen-2-em-3-carboxylate (122 mg) in tetrahydrofuran (THF) (10 ml) and water (10 ml) was treated with sodium hydrogen carbonate (42 mg) (10 ml) and 3% Pd-C catalyst (50 mg) and the mixture was hydrogenareal at atmospheric pressure for 5-10 min. The mixture was filtered through Kieselguhr, washing the filter cake with water and ethyl acetate. Combined filtrate and washings were reduced in volume using a rotary evaporator, a little NaCl was added and the mixture was chromatographed on a Diaion HP20SS column (2×10 cm), eluting with water (200 ml), followed by water/THF mixtures:--2% THF (100 ml); followed by 3% THF (100 ml), followed by 4% THF, followed by 6% THF. Fractions were monitored by uv and hplc. Fractions containing the product were combined and evaporated to lower volume and then freeze-dried to give sodium (5R,6S)-6[(1R)-1-hydroxyethyl]-2-(5-methyl-1-phenylpyrazol-3-yl)carbapen-2-em-3-carboxylate (80 mg) νmax (KBr)/cm-1 1786, 1756, 1588, 1501, 1412, 1383, 1359, 1288 1246, 1223, and 1145; λmax (H2O)/nm 300.0 (ε/dm3 mol-1 cm-1 13,232), 236.5 (ε7,027); δ (D2O) 1.26 (3H, d, J 6.4 Hz), 2.20 (3H,s), 3.1-3.29 (2H, m), 3.46 (1H, dd, J 2.9 & 5.9 Hz), 4.16-4.28 (2H, m), 6.61 (1H,s), 7.39-7.57 (5H,m);

Provenance & Evidence