Phosphate → HCID 19801176, compound

Participants

Reaction Steps

250 ml of pH 8 phosphate buffer, 150 ml of methylene chloride, 200 mg of tetrabutylammonium hydrogenosulphate and 10 g of 4-bromo-3H-indene are mixed together. At 0° C. 10 g of metachloroperbenzoic acid is added in several lots, then the temperature of the mixture is allowed to rise to the ambient over 4 hours, 10 g of metachloroperbenzoic acid is added at 0° C. and the temperature is allowed to rise to 20° C. over 2 hours. 3 g of metachloroperbenzoic acid is added and the mixture is left for 16 hours at ambient temperature, then decanted and extracted with methylene chloride; the extracts are washed with water, with a thiosulphate solution and with water, dried and evaporated to dryness. The residue is chromatographed on silica, eluting with a mixture of hexane and isopropyl ether (9-1) with 3% of triethylamine, and 4.11 g of expected product is isolated.

Provenance & Evidence