Determination on temperature gradient of different polar reactants in reaction mixture under microwave irradiation with molecular probe

Article abstract of DOI:10.1016/j.tet.2016.07.041

Temperature accurate measurement is one of key issues in illustration of the rate increase in the microwave-promoted organic reactions because reaction rates are closely related with reaction temperature. The use of molecular probe is reported as a tool to identify the microwave selective heating effects in homogenous reaction mixture of intramolecular aromatic Claisen rearrangement. Our results show direct evidence for localized superheating of polar reactants in nonpolar solvent. While in the polar solvent, the microwave selective heating effects of polar reactants will be decreased.