Pyrogallol → HCID 1617940, compound

Participants

Reaction Steps

A 500 ml three-necked round-bottom flask equipped with a magnetic stirrer was charged with 20.0 g (0.142 mol) of benzoyl chloride, 6.2 g (0.05 mol) of pyrogallol, 400 ml of methylene chloride, and 50 ml of tetrahydrofuran (THF). Triethylamine (TEA; 15.3 g, 0.15 mol) was added drop-wise via an addition funnel over a period of 10 min. After the addition of TEA, the solution was stirred for an additional 15 min and subsequently transferred to a 1000 ml separatory funnel. The solution was washed with 150 ml of a 1.0 M solution of HCl (1×), 100 ml of 0.1 M solution of NaOH (2×), 100 ml of 1.0 M solution of HCl (1×), and 100 ml of deionized water (3×). The methylene chloride layer was extracted, dried over MgSO4 for 1 hour, and filtered. The methylene chloride was removed in vacuo, and a viscous oil was recovered. The viscous oil was placed into a minimal amount of methylene chloride and crystallized from hexanes after 2-3 weeks time (slow evaporation of solvent occurred during crystallization) to afford a white, crystalline solid. The solid was filtered and dried in vacuo (30 mm Hg) overnight.

Provenance & Evidence