Sodium Hydroxide → HCID 19853899, compound

Participants

Reaction Steps

To a solution of 5.46 g (16.8 mmol) of methyl 2,2-dimethyl-6-acetylamino-7-chloro-2,3,4,5-tetrahydro-1-benzoxepin-9-carboxylate in 10 ml of methanol is added 10 ml of a 10% aqueous sodium hydroxide solution in a single portion at room temperature. The solution is heated to reflux and refluxing maintained for 2 hours. After cooling, methanol is removed in vacuo and the residue is diluted with water. The pH of this solution is adjusted to 7 with 1N HCl. The neutral solution is extracted with CH2Cl2 and the combined organic extracts are dried over MgSO4, filtered and concentrated. Flash chromatography (30% EtOAc/hexanes) provides 2,2-dimethyl-6-amino-7-chloro-2,3,4,5-tetrahydro-1-benzoxepin-9-carboxylic acid.

Provenance & Evidence