Abstract L-[4-13 C] Lysine (2) was synthesized from sodium [2-13 C] acetate (3) and Dellaria's oxazinone 1 as a chiral glycine equivalent. Wittig reaction of the glycinal 7 and 13 C-labeled phosphonium ylide 5, prepared from sodium [2-13 C] acetate (3), gave the α, β- unsaturated ester 8. The ester 8 was converted to the allylic bromide 10. Alkylation of the oxazinone 1 with 10 proceeded with high diastereoselectivity. Ethanolysis, hydrogenation ...