Abstract
A new method for the direct synthesis of 3-phosphinoylbenzothio(seleno)phenes has been achieved through an Ag-mediated radical addition-cyclization of 2-alkynylthio(seleno)anisoles with secondary phosphine oxides in good yields under mild conditions. In this single reaction, benzenethiophene or benzeneselenophene skeleton, C(sp2)-P and C(sp2)-S bonds can be constructed with the cleavage of the C(sp3)-S bond, highlighting the efficiency and step-economics of this protocol.
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