An Efficient Synthesis of (Pyrrolidin‐2‐ylidene)glycinate Using Intramolecular 1,3‐Dipolar Cycloaddition of Azide and Olefin.

Abstract Methyl and tert -butyl ( E -)-(pyrrolidin-2-ylidene)glycinates 3a and 3b were efficiently and stereoselectively synthesized from 2, 3, 5-tri- O -benzylarabinose using Horner-Emmons olefination of arabinal 9 and phosphorylglycine ester and intramolecular 1, 3-dipolar cycloaddition reaction of azide and olefin as the key reactions.