Alk-1-ynyl(3-pyridyl)- and alk-1-ynyl(2-thienyl)carbenes as the first example of (alk-1-ynyl)carbenes with hetaryl substituents at carbenic centres

Alk-1-ynyl(hetaryl)carbenes 3 have been generated from 1-(tosyloxy)-1-hetarylalk-2-ynes 2 via the elimination of para-toluenesulfonic acid on the treatment with Bu^tOK.