2-allyloxycarbonylamino-6-O-benzyl-2-deoxy-4-O-(1,5-dihydro-3-oxo-3H-2,4,3λ5-benzodioxaphosphepin-3-yl)-3-O-(2-propynyloxycarbonyl)-D-glucopyranosyl trichloroacetimidate 、
benzyloxycarbonylmethyl 2-deoxy-4-O-(4-{4-[4-(1-ethyl-2,4,6-trioxo-3,5-diazacyclohexylmethyl)phenylmethylaminocarbonyl]butyrylamino}phenylmethyl)-2-(9-fluorenylmethoxycarbonylamino)-α-D-glucopyranoside 在
三氟化硼乙醚 作用下,
以
四氢呋喃 为溶剂,
反应 2.5h,
以96%的产率得到benzyloxycarbonylmethyl 6-O-[2-allyloxycarbonylamino-6-O-benzyl-2-deoxy-4-O-(1,5-dihydro-3-oxo-3H-2,4,3λ5-benzodioxaphosphepin-3-yl)-3-O-(2-propynyloxycarbonyl)-β-D-glucopyranosyl]-2-deoxy-4-O-(4-{4-[(4-(1-ethyl-2,4,6-trioxo-3,5-diazacyclohexylmethyl)phenylmethyl)aminocarbonyl]butyrylamino}phenylmethyl)-2-(9-fluorenylmethoxycarbonylamino)-α-D-glucopyranoside