Allyl bromide → HCID 68004032, compound

Participants

Reaction Conditions

Reaction Steps

In a dry 3-necked flask flushed with argon containing a solution of 23 (3.77 g, 10.0 mmol) in THF (50 mL) at 0° C. was added isopropyl magnesium chloride lithium chloride complex (1.3 M in THF, 10 mL, 13 mmol) over 10 min. After additional 10 min of stirring at 0° C., CuI (0.2 eq, 0.38 g) was added, the mixture was stirred for 10 minutes at 0° C. and then a solution of allyl bromide (1.73 mL, 20 mmol) in THF (4.0 mL) was added at 0° C. over 10 min. After further stirring for 1 h at 0° C., the reaction was quenched with 10% citric acid and extracted with ethyl acetate (100 mL×2). The organic layers were combined which was washed with brine, dried over Na2SO4, and concentrated. The obtained residue was chromatographed on silica gel eluted with EtOAc/hexane (0-10%) to afford 2.84 g (84%) of 24 as a colorless oil. NMR (CDCl3) δ 1.48 (9 H, s), 2.21 (4 H, m), 3.28 (2 H, m), 3.41 (2 H, d, J=6.16 Hz), 4.05 (2 H, m), 5.92 (1 H, m), 7.26 (1 H, dd, J=1.56, 12.08 Hz); LC/MS (M+1) 339.

Provenance & Evidence