Ethyl chloroformate → HCID 12788499, compound

Participants

Reaction Steps

A mixture of 3.49 g of trans-4-(4-fluorophenoxy)-1-methyl-3-phenylpiperidine of Example 30, 2.53 g of anhydrous potassium carbonate, and 28 ml of dry benzene are treated all at once under a nitrogen atmosphere with 1.75 ml of ethyl chloroformate. After 1 hour at ambient temperature, the mixture is refluxed 18 hours, then cooled and partitioned between ether and water. The phases are separated and the aqueous phase is extracted with ether. The combined ether extracts are washed with 2 N HCl solution, then with saturated aqueous NaCl solution, dried over anhydrous Na2SO4, filtered and concentrated in vacuo to a gum which eventually crystallizes to a solid of trans-1-ethoxycarbonyl-4(4-fluorophenoxy)-3-phenylpiperidine, m.p. s 78°, 80°-82.5° C.

Provenance & Evidence