3-(4-{4-[6-allyloxy-5-(9H-fluoren-9-ylmethoxycarbonylamino)-2-hydroxymethyl-4-(4-methoxy-benzyloxy)-tetrahydro-pyran-3-yloxymethyl]-phenylcarbamoyl}-butyrylamino)-propionic acid 4-(5-ethyl-2,4,6-trioxo-hexahydro-pyrimidin-5-ylmethyl)-benzyl ester 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
以88%的产率得到3-(4-{4-[(2R,3S,4R,5R,6S)-6-Allyloxy-5-(9H-fluoren-9-ylmethoxycarbonylamino)-4-hydroxy-2-hydroxymethyl-tetrahydro-pyran-3-yloxymethyl]-phenylcarbamoyl}-butyrylamino)-propionic acid 4-(5-ethyl-2,4,6-trioxo-hexahydro-pyrimidin-5-ylmethyl)-benzyl ester