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.