HCID 57986843, compound → HCID 44251825, compound

Participants

Reaction Steps

To a solution of 4-[4-(4-Tetrazol-1-yl-phenoxymethyl)-thiazol-2-yl]-piperidine-1-carbonitrile (0.450, 1.22 mmol) and N-hydroxy-isobutyramidine (0.150 g, 1.47 mmol) in dry THF (10 mL) was added a 1 M solution of zinc chloride in THF (1.47 mL, 1.47 mmol) over 15 min. The suspension was left to settle for 15 minutes and the white precipitate was collected by filtration and dissolved in 4N HCl in ethanol and water (1:1). The solution was refluxed for 1 hour, cooled and the solid precipitate was filtered off. The filtrate was neutralized by the addition of excess sodium carbonate. The excess was filtered off and the filtrate was diluted with EtOAc. The solution was washed with water, separated, dried (Na2SO4), filtered and concentrated. The residual oil was chromatographed on silica gel (1:1 Hex/EtOAc) to afford the desired compound. 1H NMR (CDCl3): δ 8.92 (1H, s), 7.62 (2H, d), 7.28 (1H, s), 7.19 (2H, d), 5.24 (2H, s), 4.26 (2H, m), 3.20 (3H, m), 2.89 (1H, m), 2.26 (2H, m), 1.92 (2H, m), 1.30 (6H, d).

Provenance & Evidence