Lithium Chloride → HCID 57186048, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of (5R,6S)-7-(tert-butoxycarbonyl)-6-phenyl-3-(trimethylstannyl)-7-aza-1-oxa-spiro[4.5]dec-3-ene (0.5 g, 1 mmol; Desc.6), lithium chloride (0.266 g, 6 mmol) and 3-bromo-4-(5-(trifluoromethyl)-tetrazol-1-yl)anisole (0.404 g, 1.2 mmol; Desc. 7c) in toluene (15 ml) was degassed and purged with nitrogen before addition of tetrakis(triphenylphosphine)palladium(0) (0.06 g). The mixture was degassed thoroughly, and the solution was heated to 110° C. for 19 hours. The solvent was evaporated in vacuo. The residue was dry loaded onto silica from methanol, and purified by chromatography on silica eluting with 10-20% ethyl acetate in hexane, to afford the title compound as a yellow oil (500 mg, 90%) MS (CI+) m/z 558 (M+H, 60%). 1H NMR (250 MHz, CDCl3) δ 1.34 (9H, s), 1.50 (1H, m), 1.55 (1H, m), 1.67 (1H, m), 1.87 (1H, m), 3.08 (1H, m), 3.88 (3H, s), 4.02 (1H, m), 4.30 (1H, dd, J 2.1 Hz, J 12.4 Hz), 4.46 (1H, dd, J 2.1 Hz, J 12.4 Hz), 4.92 (1H, s), 5.30 (1H, t, J 0.9 Hz), 6.68 (1H, d, J 2.8 Hz), 6.98 (1H, dd, J 2.8 Hz, J 8.8 Hz), 7.25 (6H, m).

Provenance & Evidence