3-溴丙炔 、
N3-pivaloyloxymethyl-3',5'-O-(tetraisopropyldisiloxan-1,3-diyl)uridine 在
2-叔丁基亚氨基-2-二乙基氨基-1,3-二甲基全氢-1,3,2-二氮杂磷 作用下,
以
乙腈 为溶剂,
以48%的产率得到2,2-Dimethyl-propionic acid 2,6-dioxo-3-((2R,3R,3aR,9aR)-5,5,7,7-tetraisopropyl-3-prop-2-ynyloxy-tetrahydro-1,4,6,8-tetraoxa-5,7-disila-cyclopentacycloocten-2-yl)-3,6-dihydro-2H-pyrimidin-1-ylmethyl ester