STEREOCHEMISTRY OF THE RING CLOSURE REACTION OF OPTICALLY ACTIVE 1-AMINO-2-PROPANOL
作者:Nobuhide Yahiro
DOI:10.1246/cl.1982.1479
日期:1982.9.5
Opticallyactive 2-methylethylenimine has been prepared via ring closure reaction of (R)- or (S)-1-amino-2-propanol. The reaction is explained by an intramolecular SN2 mechanism.
Stereochemistry and chiroptical properties of the nonplanar nitrosamine group in N-nitrosoaziridines
作者:G. V. Shustov、A. V. Kachanov、G. K. Kadorkina、R. G. Kostyanovskii、Arvi Rauk
DOI:10.1021/ja00047a041
日期:1992.10
The stereochemistry and the chiropticalproperties of the nonplanar nitrosamine group were investigated by means of nonempirical quantum chemical calculations on 1-nitrosoaziridine, (2R)-2-methyl-1-nitrosoaziridine, and (2S,3S)-2,3-dimethyl-1-nitrosoaziridine, and by experimental measurement of the CD spectra of compounds 2, 3, (2S)-2-carbomethoxy-1-nitrosoaziridine, and (2S,3S)-2,3-bis(isopropoxy
A straightforward synthesis of a series of new catalysts containing secondary hydroxyl and aziridine moieties as nucleophilic centers built on the chiral scaffold of (S)-(+)-mandelic acid is described. The new compounds have been tested for the enantioselective addition of diethylzinc and phenylethynylzinc to aryl and alkyl aldehydes, which yielded the corresponding chiral alcohols in high chemical yields (up to 95%) and with excellent ee's of ca. 90%. The strong influence of the stereogenic center located at the aziridine subunit on the stereochemical outcome is also reported on. (C) 2013 Elsevier Ltd. All rights reserved.