Stereoselective Synthesis of α-Diazo Oxime Ethers and Their Application in the Synthesis of Highly Substituted Pyrroles through a [3+2] Cycloaddition

The stereoselective diazo transfer reaction with oxime ethers offers an efficient route to the corresponding α‐diazo oxime ethers. The utility of these compounds has been demonstrated by the synthesis of highly substituted pyrroles through a [3+2] cycloaddition of α‐oximino carbenoids with enamines (see scheme).