A partial synthesis of 23-hydroxybetulonic acid and 23-hydroxybetulinic acid starting from betulinic acid

F Sun, P Zhu, H Yao, X Wu, J Xu

Index: Journal of Chemical Research, , vol. 36, # 5 p. 254 - 257

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Abstract

... JOURNAL OF CHEMICAL RESEARCH 2012 257 ... δ 0.81, 0.95, 0.99, 1.02, 1.67 (each 3H, s, 24, 25, 26, 27 and 30-CH3), 2.17–2.33 (4H, m), 2.55–2.67 (1H, m), 3.02 (1H, m, H-19), 3.40, 3.63 (each 1H, m, H-23), 4.59, 4.72 (each 1H, s, H-29), 5.12, 5.17 (each 1H, d, J = 12.3 Hz ...