Cycloadditions in syntheses. Part XLVIII. Synthesis of nucleosides and related compounds. XVII. Dialkyl 1,3-dithiethan- and 1,3-dithiolan-2-ylidenemalonate S-oxides: Equivalents to dialkoxycarbonylketenes.
Cycloadditions in syntheses. Part XLVIII. Synthesis of nucleosides and related compounds. XVII. Dialkyl 1,3-dithiethan- and 1,3-dithiolan-2-ylidenemalonate S-oxides: Equivalents to dialkoxycarbonylketenes.