(4aR,10aR)-6-甲氧基-4-甲基-9-甲硫基-2,3,4a,5,10,10a-六氢萘并[2,3-b][1,4]恶嗪 、
盐酸 在
乙醚 作用下,
以
丙酮 为溶剂,
以(-)-(4aR,10aR)-3,4,4a,5,10,10a-hexahydro-6-methoxy-4-methyl-9-methylthio-2H-naphth[2,3-b]-1,4-oxazine hydrochloride is obtained (m.p. 237°-239°)的产率得到(-)-(4aR,10aR)-3,4,4a,5,10,10a-hexahydro-6-methoxy-4-methyl-9-(methylthio)-2H-naphth[2,3-b]-1,4-oxazine hydrochloride