Tetrahedron Letters p. 237 - 240 (1994)
Update date:2022-07-31
Topics:
Pauly, Regine
Sasaki, N. Andre
Potier, Pierre
Two different types of cyclic α-amino acids, cycloalkylglycines and N-heterocyclic α-amino acids, were prepared in optically pure form from the same chiral synthon 1-(R) (or 1-(S)) simply by altering the quantity or type of base required for anion formation.Elaboration of the heterocyclic intermediate 3 provided α,β-unsaturated N-heterocyclic α-amino acids.
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(2014)