1,4-Dioxane-2,6-dione → HCID 20339714, compound

Participants

Reaction Steps

A 1.02 gram (2.10 millimoles) sample of sodium {2-[6-(4-benzhydrylpiperidino)hexyl]amino-2-oxoethoxy}acetate (prepared as described in Example XIII) and 7.3 milliliters of 5 N aqueous NaOH is heated under reflux temperature for 1.5 hours to obtain 6-(4-benzhydrylpiperidino)hexanamine and diglycolate in the reaction mixture; the mixture is then diluted with 25 milliliters of water and extracted with ether. The ether solution is washed with aqueous NaCl, dried with Na2SO4, and concentrated to obtain as residue, 6-(4-benzhydrylpiperidino)hexanamine. To a solution of 0.685 gram (1.96 millimoles) of the thus prepared 6-(4-benzhydrylpiperidino)hexanamine in 14 milliliters of dichloromethane is added drop by drop during about 10 minutes, a warm solution of 0.227 gram (1.95 millimole) of diglycolic anhydride in 26 milliliters of dichloromethane. After the addition, the mixture is stirred at a temperature range of 25°-30° C. for two hours to obtain the desired {2-[ 6-(4-benzhydrylpiperidino)hexyl]amino-2-oxoethoxy}acetic acid; the latter is isolated by volatilization of the solvent.

Provenance & Evidence