The condensation of the chiral dioxolane (I) with 5(E)-(2-bromovinyl)uracil (II) by means of Tbdms-OTf and lutidine gives the silylated nucleoside (II), which is purified by chromatography. Finally, this compound is deprotected by means of TBAF in acetonitrile. (1,2)
The condensation of the chiral dioxolane (I) with 5(E)-(2-chlorovinyl)uracil (II) by means of Tbdms-OTf and lutidine gives the silylated nucleoside (II) that is purified by chromatography. Finally, this compound is deprotected by means of TBAF in acetonitrile.
The condensation of the chiral dioxolane (I) with 5(E)-(2-iodovinyl)uracil (II) by means of Tbdms-OTf and lutidine gives the silylated nucleoside (II), which is purified by chromatography. Finally, this compound is deprotected by means of TBAF in acetonitrile.