Tetrahedron letters

A practical synthesis of betulinic acid

R Csuk, K Schmuck, R Schäfer

Index: Csuk, Rene; Schmuck, Kianga; Schaefer, Renate Tetrahedron Letters, 2006 , vol. 47, # 49 p. 8769 - 8770

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Citation Number: 43

Abstract

A new synthetic route for the synthesis of betulinic acid from betulin has been developed. The main step of this procedure is the selective oxidation of the primary alcohol function of betulin without affecting the secondary hydroxyl group. Applying shorter reaction times and lower temperatures results in the exclusive formation of the corresponding aldehyde, betulinal.

~87%

~91%

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