7-formyl-2,3-dihydro-1,4-benzodioxin-5-carbonitrile 、 (6S)-6-[(4-amino-1-piperidinyl)methyl]-5,6-dihydro-3H,4H,7H-1,3a,6a-triazaphenalene-3,7-dione dihydrochloride 在
sodium acetate 作用下,
以
甲醇 、
溶剂黄146 为溶剂,
以51%的产率得到7-{[(1-{[(6S)-3,7-dioxo-5,6-dihydro-3H,4H,7H-1,3a,6a-triazaphenalen-6-yl]methyl}-4-piperidinyl)amino]methyl}-2,3-dihydro-1,4-benzodioxin-5-carbonitrile