Vinyl Acetate → HCID 86604660, compound

Participants

Reaction Steps

To a gently shaking solution of 1-(6-bromo-2-pyridinyl)-1-pentanol (1.00 g, 4.10 mmol) in dry cyclohexane (100 mL) was added Lipase PS-C “Amano” (Pseudomonas cepacia) (9.97 g) followed by vinyl acetate (1.5 mL, 16.27 mmol). Shaking was continued for 7.5 h with continual monitoring by chiral HPLC. The mixture was then filtered and the filtrate reduced under vacuum to give an oil which was purified by SPE (silica, 20 g cartridge) eluting with cyclohexane:EtOAc (gradient 50:1 to 2:1) to afford (1R)-1-(6-bromo-2-pyridinyl)pentyl acetate as an oil (737 mg, 63%). LC/MS: m/z 286.1/288.1 [M+H]+, Rt 3.38 min. Analytical chiral HPLC (25 cm Chiralpak AD) eluting with 2% EtOH in heptane, f=1.0 mL/min, wavelength 215 nm, (S-) Rt 5.1 min and (R-) Rt 5.4 min (43% ee) and the title compound as an oil (349 mg).

Provenance & Evidence