(1R,15R,16R,20R)-12-[(2R,3S,5R)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl]oxy-18,18-dimethyl-12-oxido-11,13,17,19,21-pentaoxa-2,4-diaza-12-phosphoniatetracyclo[13.5.1.12,6.016,20]docos-6(22)-ene-3,5-dione 在
三氟乙酸 作用下,
以85%的产率得到(2R,3R,4S,5R)-3,4-Dihydroxy-8-[(2R,3S,5R)-2-hydroxymethyl-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yloxy]-8-oxo-7,9,19-trioxa-1,16-diaza-8λ
5-phospha-tricyclo[12.3.1.1
2,5]nonadec-14(18)-ene-15,17-dione