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22. For a more detailed discussion on this topic see Ref. 15.
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T.; Li, Y.; Loncharich, R. J. Science 1986, 231, 1108–1117.
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Tejero, T.; Lanaspa, A. Acta Cryst. Sect. C 1996, 52, 2536–2538. (c) Merino, P.; Merchan, F. L.; Tejero, T. Unpublished
crystallographic results; see also Ref. 12. The presence of an intramolecular hydrogen bond has been also confirmed in
other α-(tert-butoxycarbonylamino) hydroxylamines; see: Merino, P.; Lanaspa, A.; Merchan, F. L.; Tejero, T. Zeits. Krist.
1997, 212, 323–324 and Merino, P.; Lanaspa, A.; Merchan, F. L.; Tejero, T. Acta Cryst. Sect. C. 1998, 54, 85–86.
25. A similar chelation with the carbonyl group of a carbamate moiety has been described for N-(tert-butoxycarbonyl)-α-amino
aldehydes. See for example: Garner, P.; Ramakanth, S. J. Org. Chem. 1986, 51, 2609–2612.
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