Journal of the American Oil Chemists Society

, Volume 38, Issue 11, pp 600–605

Low temperature aminolysis of methyl stearate catalyzed by sodium methoxide

Authors

  • Edmund F. JordanJr.
    • Eastern Regional Research Laboratory
  • William S. Port
    • Eastern Regional Research Laboratory
Technical

DOI: 10.1007/BF02633368

Cite this article as:
Jordan, E.F. & Port, W.S. J Am Oil Chem Soc (1961) 38: 600. doi:10.1007/BF02633368

Abstract

Aminolysis of methyl stearate by both primary and secondary amine catalyzed by sodium methoxide was found to be rapid at 30°C. under anhydrous conditions. With primary amines under optimum conditions (mole ratio to ester: amine, 10; catalyst, 0.12), the minimum reaction times necessary to obtain yields of amide over 90% were:n-butylamine, 30 min.;iso-butyl-, 1 hour; allyl-, 1.8 hr.; benzyl-, 3.2 hr.;sec-butyl-, 16 hr.; ammonia (a heterogenous reaction requiring an optimum triethylamine to ester ratio of 2 ml./g. and a catalyst mole ratio of 0.20) 2 days. Secondary amines reacted rapidly at 30°C. (15 min. to 24 hr. for a 90% yield of amide) when the nitrogen atom was joined into a saturated ring or held at least one methyl group, but very slowly even at 100°C, when the substituent was dialkyl larger than methyl. Uncatalyzed, all reactions were extremely slow.

Copyright information

© The American Oil Chemists’ Society 1961