dimethyl 1',5',6',10b'-tetrahydrospiro[cyclopropane-1,2'-isoxazolo[3,2-a]isoquinoline]-2,3-dicarboxylate 、 dimethyl 1',5',6',10b'-tetrahydrospiro[cyclopropane-1,2'-isoxazolo[3,2-a]isoquinoline]-2,3-dicarboxylate 、 dimethyl 8,9-dimethoxy-1',5',6',10b'-tetrahydrospiro[cyclopropane-1,2'-isoxazolo[3,2-a]isoquinoline]-2,3-dicarboxylate 、 dimethyl 8,9-dimetoxy-1',5',6',10b'-tetrahydrospiro[cyclopropane-1,2'-isoxazolo[3,2-a]isoquinoline]-2,3-dicarboxylate 以
对二甲苯 为溶剂,
反应 3.0h,
以71%的产率得到dimethyl 2-hydroxy-4,6,7,11b-tetrahydro-1H-pyrido[2,1-a]isoquinoline-3,4-dicarboxylate