(3aS,5aS,5bR,7aR,11aR,11bS,13aR)-3,3a,5b,7a,10,10,11b,13a-Octamethyl-3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysene-2-carboxylic acid methyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
以35 mg的产率得到methyl 3-nor-friedelan-2α-carboxylate