Tetrahydrofuran → HCID 72728038, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2,3-methylenedioxybenzaldehyde (150 mg) in 5 mL THF was added 22 mg of ZnBr2. With stirring, 250 mg of α,α-bis(trimethylsilyl)-t-butylacetaldimine (7) was added, and stirring was continued overnight. The solution was cooled to 10° C., then hydrolyzed by the addition of a solution of ZnCl2 (22 mg) in diethyl ether/water (5 mL each), followed by stirring at room temperature for 1 h. The solids were removed by filtration through Celite and the filtrate extracted with diethyl ether (2×). The combined ether extracts were washed with water and brine, dried over magnesium sulfate, filtered and concentrated to provide the title compound as a brown oil (150 mg): 1H NMR (CDCl3) δ 6.09 (s, 2H), 6.14 (s, 1H), 6.86–6.98 (m, 4H), 7.43 (d, 1 H, J=9.6 Hz), 9.69 (d, 1H, J=4.5 Hz).

Provenance & Evidence