tert-butyl N-hydroxycarbamate → [(tert-Butoxy)carbonyl]amino (2R)-2-{[(tert-butoxy)carbonyl](methyl)amino}propanoate

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[(tert-Butoxy)carbonyl]amino (2R)-2-{[(tert-butoxy)carbonyl](methyl)amino}propanoate is prepared from (2R)-2-{[(tert-butoxy)carbonyl](methyl)amino}propanoic acid and N-tert-butoxycarbonyl hydroxylamine according to Scheme 6. The compound exists as rotomers and is reported as such. (0.95 g, 60%), 1H NMR (500 MHz, CHLOROFORM-d) δ ppm 7.81-7.95 (1H, m), 4.60-5.04 (1H, m), 2.85-2.93 (3H, m), 1.40-1.54 (18H, m), 1.22-1.33 (3H, m).

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