An I(2) promoted domino protocol was developed to construct 2-acylbenzothiazoles from simple and readily available aromatic ketones/unsaturated methyl ketones and o-aminobenzenethiols. The reaction proceeded smoothly under metal-free and peroxide-free conditions.
A short synthesis of (±)-phyllodulcin (1), a sweetprinciple of HydrangeaserrataSeringevar. thunbergiiSugimoto, from the enaminone (2) by annelation with dimethyl 3-oxaglutarate is described.