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Facile Microwave-Assisted Michael Addition of Diphenacyl Sulfides to Chalcones under Solvent-Free Conditions: Generation of Symmetrical and Unsymmetrical 1,5-Diketones. -Optimum reaction conditions are examined for the addition of diphenacyl sulfides (I) to substituted chalcones (II) to give 1,5-diketones (III). Highest yields are obtained when the reaction is performed under solvent-free conditions and microwave irradiation. -(PAUL, N.; SHANMUGAM, M. J.; MUTHUSUBRAMANIAN*, S.; Synth. Commun. 43 (2013) 1, 129-138, http://dx.doi.org/10.1080/00397911.2011.593106 ; Dep. Org. Chem., Madurai Kamaraj Univ., Madurai 625 021,Tamil Nadu, India; Eng.) -M. Bohle 21-074