(3aR,9bR)-8-Methoxy-9b-methyl-5-oxo-1,2,3a,4,5,9b-hexahydro-5λ
4-thiochromeno[3,4-b]pyrrole-3-carboxylic acid ethyl ester 在
lithium aluminium tetrahydride 作用下,
以
乙醚 为溶剂,
以92.6%的产率得到8-methoxy-3,9b-dimethyl-1,2,3,3a,4,9b-hexahydro<1>benzothiopyrano<3,4-b>pyrrole