A facile method for the synthesis of new isoxazoline derivatives are being reported starting from substituted 1-(1H-indol-3-yl)-3-(substituted aryl)-prop-1-en-3-ones and hydroxylamine hydrochloride under solvent free conditions and microwave irradiation. This approach has advantages such as short reaction time, moderate to excellent yield, over the conventional synthesis. The structures of the compounds were confirmed by 1 H NMR, IR, mass spectra and elemental (C, H, N) analysis.