Triethylamine → HCID 10672818, compound

Participants

Reaction Steps

3,3-Dibromo-7-(triisopropylsilyloxy)-4-chromanone (5.0 g, 10.5 mmol) was dissolved in CH3CN (150 ml) and 4-hydroxy-4-phenylpiperidine (2.2 g, 12.5 mmol) and triethylamine (2.9 ml, 20.8 mmol) were added. The mixture was stirred overnight at ambient temperature, then concentrated and the residue partitioned between ethyl acetate and water. The organic layer was washed with water (2×50 ml) and brine, dried over CaSO4, concentrated, and the residue chromatographed on silica gel, using gradient elution with ethyl acetate/hexane to yield title product as a white solid (2.3 g, 54%). A portion was recrystallized from ethanol/ether; mp 163°-163.5° C.; IR (KBr) 3437, 2950, 2870, 1635, 1615, 1600, 1447, 1285, 1247, 1200, 1185, 703, 690. Anal. Calcd. for C29H39NO4Si: C, 70.55; H, 7.96; N, 2.84. Found: C, 70.44; H, 7.76; N, 2.84.

Provenance & Evidence