(3aR,4R,12aS,12bR)-4-hydroxy-2,2-dimethyl-4,5,12a,12b-tetrahydro-3aH,7H-[1,3]dioxolo[3,4]pyrido[2,1-b]pyrido[3,2-e][1,3]thiazin-7-one 在
盐酸 作用下,
以
1,4-二氧六环 为溶剂,
以71.4%的产率得到(8R,9R,10R,10aS)-8,9,10-trihydroxy-8,9,10,10a-tetrahydro-5H,7H-dipyrido[2,1-b:3',2'-e][1,3]thiazin-5-one