If somebee wants to play chemistry with his microwave owen, here is the PDF of the paper I referenced two posts above.
Microwave-assisted Henry reaction: Solventless Synthesis of conjugated Nitroalkanes.Tetrahedron Letters 38 (1997), 5131-5134.
Varma R. J., Dahiya R., Kumar S.
Abstract: In a solventless system and under microwave irradiation, nitroalkanes react with arylaldehydes in the presence of a catalytic amount of ammonium acetate to afford, in one step, conjugated nitroalkenes without the isolation of intermediary beta-nitro alcohols.