、 Phosphoric acid benzotriazol-1-yl ester (2R,3R,4R,5R)-2-[bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-5-(2,4-dioxo-3-phenyl-3,4-dihydro-2H-pyrimidin-1-yl)-4-(4-methoxy-tetrahydro-pyran-4-yloxy)-tetrahydro-furan-3-yl ester 2-chloro-phenyl ester 在
N-甲基咪唑 作用下,
以
四氢呋喃 为溶剂,
生成