(1–50 mol %) under ambient conditions to regenerate the original carbonyl compounds in good to excellent yield. This mild, simple, and environmentally benign system is successfully applied to the deprotection of S,O- and O,O-acetals and is compatible with various functional groups. From the mechanistic study of the reaction, the catalytic cycle is considered to be composed of the following four steps: (1) the
shown that nickel containing Complex Reducing Agents NaH-RONa-NiX2 as such or in the presence of ligands are very efficient in desulfurizing organiccompounds such as sulfur containing heteroaromatic substrates, aryl thioethers, dithioketals, sulfoxides or sulfones.