Recently gallium and its compounds are gradually attracting attention as useful reagents in organic synthesis.1À7 Gallium enolate-mediated intermolecular aldol reaction and addition of a-bromoketone with imine, a straightforward and versatile preparation of prop-2-ynylic alcohols from alklynes and aldehydes via GaI3 and amine have been documented.3 Kobayashi reported that gallium reagents could e¤ciently promote the glycosidation of glycopyranosyl £uoride.4 The ...
