(4S,7R,12bR)-7-Benzoylsulfanylmethyl-6-oxo-1,2,3,4,6,7,8,12b-octahydro-benzo[c]pyrido[1,2-a]azepine-4-carboxylic acid 在
甲醇 、
sodium methylate 作用下,
以56%的产率得到(4S,7R,12bR)-6-oxo-7-(sulfanylmethyl)-2,3,4,7,8,12b-hexahydro-1H-pyrido[2,1-a][2]benzazepine-4-carboxylic acid