N-Boc-α-tosylsarcosine ethyl ester: An α-amido sulfone for the regio- and stereoselective synthesis of protected γ,δ-unsaturated n-methyl-α- amino acids by palladium-catalyzed nucleophilic substitution

1. Alonso, D.A.
2. Costa, A.
3. Nájera, C.