methyl (5R,7S,8R)-8-{[4-(1,1-dioxido-3,4-dihydro-2H-1-benzothiopyran-4-yl)benzoyl]amino}-1-oxaspiro[4.4]nonane-7-carboxylate 在
盐酸羟胺 、
sodium methylate 作用下,
以
甲醇 为溶剂,
以37%的产率得到(5R,7S,8R)-8-{[4-(1,1-dioxido-3,4-dihydro-2H-1-benzothiopyran-4-yl)benzoyl]amino}-N-hydroxy-1-oxaspiro[4.4]nonane-7-carboxamide