1-methyl-5-(sulphooxy)-5,6,7,8-tetrahydro-4,7-methano-4H-pyrazolo[3,4-e][1,3]diazepin-6(1H)-one 1-propenyltriphenylphosphonium salt 在
DOWEX 50WX
8 resin column in the Na+ form 作用下,
以
四氢呋喃 、
水 为溶剂,
以84%的产率得到1-methyl-5-(sulphooxy)-5,6,7,8-tetrahydro-4,7-methano-4H-pyrazolo[3,4-e][1,3]diazepin-6(1H)-one sodium salt