4-[(2-fluoro-5-hydroxy-4-methylphenyl)amino]-5-oxo-6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepine-8-carbaldehyde 、
3-methyltetrahydro-2H-pyrazino[1,2-a]pyrazine-1,4(3H,6H)-dione 在
原甲酸三甲酯 、
三乙酰氧基硼氢化钠 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以19 mg的产率得到rac-8-({4-[(2-fluoro-5-hydroxy-4-methylphenyl)amino]-5-oxo-6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepin-8-yl}methyl)-3-methyltetrahydro-2H-pyrazino[1,2-a]pyrazine-1,4(3H,6H)-dione