tert-butyl (S)-1-((E)-((8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-7,8,9,11-tetrahydro-1H-cyclopenta[a]phenanthren-3 (2H,6H,10H,12H,13H,14H,15H,16H,17H)-ylidene)aminooxy)-3-methyl-1-oxobutan-2-ylcarbamate 在
三氟乙酸 、
盐酸 作用下,
以
二氯甲烷 、
1,4-二氧六环 为溶剂,
反应 1.75h,
以78%的产率得到(S)-1-((E)-((8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-7,8,9,11-tetrahydro-1H-cyclopenta[a]phenanthren-3(2H,6H,10H,12H,13H,14H,15H,16H,17H)-ylidene)aminooxy)-2-amino-3-methylbutan-1-one hydrochloride