A convenient synthesis of (S)-2-Azidonitriles, (S)-2-aminonitriles and (S)-1,2-diamines
摘要:
(S)-2-Azidonitriles (S)-4 are easily accessible from (R)-2-(sulfonyloxy)nitriles (R)-2 by nucleophilic substitution with alkali azides 3 under complete inversion of configuration. The azidonitriles (S)-4 can be converted by catalytic hydrogenation into (S)-2-aminonitriles (S)-8 and by hydrogenation using LiAlH4 into (S)-1, 2-diaminoalkanes (S)-9, respectively, both, (S)-8 and (S)-9, isolated as hydrochlorides. Hydrolysis of the aminonitrile hydrochlorides (S)-8 HCl in a saturated solution of HC1 in alcohol gives (S)-2-amino carboxamide hydrochlorides(S)-10 . HCl with enantiomeric excesses >99% after recrystallization.
A convenient preparation of 2-substituted (S)-aziridines
作者:Franz Effenberger、Uwe Stelzer
DOI:10.1016/0957-4166(94)00385-o
日期:1995.1
2-Monosubstituted (S)-aziridines (S)-3 were obtained by hydrogenation of (R)-2-sulfonyloxynitriles (R)-2 with LiAlH4 in good chemical yields and high enantiomeric excess.
He, Anyu; Falck, J. R., Journal of the American Chemical Society, 2010, vol. 132, p. 2524 - 2525