Synthesis of N-Substituted Pyrroles From Azlactones via 1,3-Oxazolium 5-Oxides
In situ N-alkylation of azlactones (1,3-oxazol-5(4H)-ones) with reactive alkylating agents has been successfully accomplished.The resulting mesoionic 1,3-oxazolium 5-oxides (munchnones) are further transformed into N-alkylated pyrroles via a 1,3-dipolar c