3-(2-Ethoxycarbonyl-ethyl)-1-methyl-1,2,3,4-tetrahydro-pyrido[3,2-e][1,2,4]triazine-3-carboxylic acid ethyl ester 160.0 ℃
、13.33 Pa
条件下,
反应 4.0h,
以80%的产率得到6a-ethyloxycarbonyl-5,6,6a,7-tetrahydro-5-methylpyrido[3,2-e]pyrrolo[2,1-c][1,2,4]triazin-9(8H)-one