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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Visible-Light-Promoted Thioetherification Reactions via Electron Donor-Acceptor Complexes between Active Esters and
1Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China.
Abstract:
Visible-light-promoted thioetherification reactions occur via electron donor-acceptor (EDA) complexes between tetrachloro-N-hydroxyphthalimide esters (TCNHPI esters) and sulfinates. A series of alkyl aryl thioesters were obtained in yields of up to 85% across 38 cases. The measurement of association constant (KEDA = 584 M-1) shows very strong interaction in the EDA complex. The mechanism has been demonstrated by isolated byproducts, radical capture, UV/vis absorption, and fluorescence spectral measurements. The protocol provides a new facile approach for the synthesis of sulfides with odorless sulfinates in a mild condition.
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