Methyl p-toluenesulfonate → HCID 22467256, compound

Participants

Reaction Steps

Sodium hydride (289 mg of a 60% dispersion in paraffin wax) was added in portions to a stirred solution of methyl 2-(6-bromo-1H-3-indolyl)-2-(7-methoxy-1,3-benzodioxol-5-yl)acetate (from step (c), 2.7 g, 6.5 mmol) in anhydrous dimethylformamide (20 ml) at 0° C. under a nitrogen atmosphere. After 30 minutes, methyl p-toluenesulphonate (1.34 g, 7.2 mmol) was added. After a further 1 hour the mixture was partitioned between diethyl ether and water. The organic layer was separated and washed twice with water. The organic layer was dried (magnesium sulphate) and the solvent was removed in vacuo. The residue was purified by flash column chromatography (using 30% hexane, 70% dichloromethane as eluant) to give 1.49 g of the subtitle compound.

Provenance & Evidence