Tetrahedron Letters p. 379 - 380 (1996)
Update date:2022-08-05
Topics:
Calmes, Monique
Daunis, Jacques
Mai, Nathalie
Natt, Francois
Optically active R phenylglycine methyl ester hydrochloride (ee = 98%) was prepared in 90% yield from racemic phenylglycine. The key step was the base catalysed diastereoselective addition at -78°C of R pantolactone to the N-phthalyl protected phenylglycine ketene.
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(1969)
