1-(triphenylmethyl)-1H-imidazole-4-carbaldehyde → HCID 59032668, compound

Participants

Reaction Conditions

Reaction Steps

To a mechanically stirred solution of the aldehyde (16) (19.65 g, 58.1 mmol) in dry tetrahydrofuran (1 L), was added (3-benzyloxypropyl)triphenyl phosphonium bromide (30.02 g, 61.1 mmol). The resulting suspension was cooled to 15° C., and then a 1.0M solution (61.4 mL; 61.4 mmol) of potassium t-butoxide in tetrahydrofuran was added over five minutes. The reaction mixture was allowed to warm to room temperature and was stirred for 2 h. The reaction mixture was filtered through Celite; the filter cake was washed with tetrahydrofuran (2×150 mL); the filtrate and washings were combined, diluted with ether (800 mL) and refiltered through fresh Celite. The filtrate was concentrated under vacuum, and the residue was chromatographed on silica gel, eluting with a gradient of hexanes-ethyl acetate (3:1 to 2:1), to obtain the title compound (17) as a pale yellow powder, mp 101-104° C. MS(FAB) 471 (MH+).

Provenance & Evidence