6,7-Dihydro-1-(4-methylphenylsulfonyl)-2-(triphenylphosphoranylidenamino)-1H-azepin-3,5-dicarbonsaeure-dimethylester 、
异氰酸异丙酯 以
乙腈 为溶剂,
反应 120.0h,
以56%的产率得到4,7,8,9-Tetrahydro-3-isopropyl-2-methoxy-9-(4-methylphenylsulfonyl)-4-oxo-3H-pyrimido<4.5-b>azepin-6-carbonsaeure-methylester