(3aS,4R,5S,12aS,12bS)-4-hydroxy-5-(hydroxymethyl)-2,2-dimethyl-4,5,12a,12b-tetrahydro-3aH,7H-[1,3]dioxolo[3,4]pyrido[2,1-b][1,3]benzothiazin-7-one 在
盐酸 作用下,
以
1,4-二氧六环 为溶剂,
以78%的产率得到(5aS,6S,7S,8R,9S)-6,7,8-trihydroxy-9-(hydroxymethyl)-6,7,8,9-tetrahydro-5aH,11H-pyrido [2,1-b][1,3]benzothiazin-11-one