Abstract
Protonation of the reactive 1:1 intermediate produced in the reaction of acetylenic esters and triphenylphosphine by 6-aminouracil or 6-amino-N,N′-dimethyluracil leads to vinylphosphonium salts, which undergo Michael addition with the conjugate base of the NH acid to produce highly fanctionalized, salt-free phosphorus ylides in excellent yields.
GRAPHICAL ABSTRACT
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ACKNOWLEDGMENTS
We gratefully acknowledge financial support from the Research Council of Islamic Azad University of Yazd and the Islamic Azad University of Zahedan of Iran.