3β-bromospiro<5α-cholestane-6,3'-hexahydro-s-tetrazine>-6'-thione 、
氯乙酸 在
sodium acetate 作用下,
以
乙醇 为溶剂,
反应 5.0h,
以48%的产率得到(3S,5S,6R,8S,9S,10R,13R,14S,17R)-3-bromo-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]spiro[1,2,3,4,5,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-6,3'-2,4-dihydro-[1,3]thiazolo[3,2-b][1,2,4,5]tetrazine]-6'-one