Nitrogen Dynamics and Reactivity of Chiral Aziridines: Generation of Configurationally Stable Aziridinyllithium Compounds
作者:Leonardo Degennaro、Rosmara Mansueto、Elisa Carenza、Rosanna Rizzi、Saverio Florio、Lawrence M. Pratt、Renzo Luisi
DOI:10.1002/chem.201003424
日期:2011.4.26
complexation of the lithiating agent by the lone pair of electrons on the aziridinenitrogen would cause addition to the oxazoline CN bond, thus ending up with the formation of oxazolidines, which are precursors of useful chiral ketoaziridines. The proposed model has been also supported by estimating the nitrogeninversion barrier by dynamic NMR spectroscopic experiments.
Efficient Synthesis of Enantiomerically Pure 2-Acylaziridines: Facile Syntheses of <i>N</i>-Boc-safingol, <i>N</i>-Boc-<scp>d</scp><i>-erythro</i>-sphinganine, and <i>N</i>-Boc-spisulosine from a Common Intermediate
作者:Jung Min Yun、Tae Bo Sim、Heung Sik Hahm、Won Koo Lee、Hyun-Joon Ha
DOI:10.1021/jo034755a
日期:2003.10.1
Various enantiomerically pure 2-acylaziridines were prepared efficiently from the corresponding aziridine-2-carboxylate via Weinreb's amide and the subsequent treatment of organometallic compounds. The carbonyl group of those 2-acylaziridines was stereoselectively reduced by NaBH4in the presence of ZnCl2 to give erythro-1,2-amino alcohols with high diastereoselectivities and chemical yields. Using