New masked δ-lithiocarbonyl compounds: Preparation and synthetic applications

Article abstract of DOI:10.1016/S0040-4020(01)80409-9

The reaction of 2-(4-chlorobutyl)-1,3-dioxolanes (1a-c) or 2-(4-chlorobutyl)-2-ethyl-1,3-dithiane (1d) with an excess of lithium powder and a catalytic amount of naphthalene (8 mol %) in THF at - 78°C leads to a solution of the corresponding masked lithiu