6-(4,4-ethylenedioxy-1-piperidinyl)-8-methyl-1,2,4-triazolo [4,3-b]pyridazine 在
乙醇 、 ice 、
乙醚 作用下,
以
溶剂黄146 为溶剂,
反应 7.0h,
以to give 1-(8-methyl-1,2,4-triazolo [4,3-b]pyridazin-6-yl)-4-piperidinone as cream-colored needles melting at about 196.5°-199° C.的产率得到1-(8-methyl-1,2,4-triazolo [4,3-b]pyridazin-6-yl)-4-piperidinone