三氯乙腈 、
Benzoic acid (2R,3S,4R,5R,6R)-2-benzyloxymethyl-5-(3,4-dimethyl-2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-4-(9H-fluoren-9-ylmethoxycarbonyloxy)-6-hydroxy-tetrahydro-pyran-3-yl ester 在
sodium hydride 作用下,
以
二氯甲烷 为溶剂,
以92%的产率得到Benzoic acid (2R,3S,4R,5R,6S)-2-benzyloxymethyl-5-(3,4-dimethyl-2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-4-(9H-fluoren-9-ylmethoxycarbonyloxy)-6-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-3-yl ester