In course of our studies on geochemical biomarkers we required a series of lupane standards.We report here an efficient synthesis of lupane (1) in three steps from betulin (3) in an overall yield of 47.2 percent. 17β(H)-28-Norlupane (2) was obtained in 90
Wahhab, Amal,Ottosen, Margaret,Bachelor, Frank W.
p. 570 - 577
(2007/10/02)
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