Sodium Carbonate → 4-[N-(carbobenzyloxy)-N-hexadecylamino]-2-thiophenecarbonyl chloride

Participants

Reaction Conditions

Reaction Steps

To 15 g. 4-(hexadecylamino)-2-thiophenecarboxylic acid in 200 ml. warm chloroform is added a solution of 15 g. of sodium carbonate in 150 ml. water. To the vigorously stirred solution is added 10 g. carbobenzyloxy chloride. After 2 hours stirring at 40° C., the organic layer is separated, washed three times with 1 N hydrochloric acid, dried, and evaporated to yield an oil. The oil is dissolved in 300 ml. toluene, treated with 15 ml. thionyl chloride and the solution is refluxed for 5 hours. The solvents are evaporated and the residue is dissolved three times in toluene, evaporating each time, ultimately to yield 4-[N-(carbobenzyloxy)-N-(hexadecyl)amino]-2-thiophenecarbonyl chloride as a viscous, orange oil.

Provenance & Evidence