Sodium borohydride → HCID 69231625, compound

Participants

Reaction Steps

A 100 mL round bottomed flask was charged with 3-{2-formyl-4-[2-(2-phenyloxazol-4-yl)ethoxy]phenyl}propionic acid tert-butyl ester (1.82 g, 4.18 mmol) and absolute ethanol (20 mL). The stirring solution was cooled in an ice/ethanol bath and treated with sodium borohydride (0.31 g, 8.36 mmol). The cold bath was removed, and the mixture was stirred at ambient temperature under a nitrogen atmosphere for 2 h. The reaction mixture was poured into EtOAc (100 mL) and ice water (100 mL). The organic layer was washed with brine, dried (Na2SO4), and concentrated to a yellow oil (1.62 g, 88%). 1H NMR (400 MHz, CDCl3) δ 1.38 (s, 9H), 2.37 (s, 3H), 2.54 (t, J=7.6 Hz, 2H), 2.88 (t, J=7.6 Hz, 2H), 2.97 (t, J=6.6 Hz, 2H), 4.23 (t, J=6.6 Hz, 2H), 4.66 (s, 2H), 6.78 (dd, J=8.3, 2.9 Hz, 1H), 6.94 (d, J=2.4 Hz, 1H), 7.09 (d, J=8.3 Hz, 1H), 7.38-7.45 (m, 3H), 7.97 (dd, J=8.1, 1.7 Hz, 2H). MS (ES) m/e 438 (M+1).

Provenance & Evidence