Reaction of Imines with Trichloroacetic Esters or Anhydride Promoted by Iron Carbonyl or Microwave Irradiation. Preparation of 3,3-Dichloro-β-Lactams
作者:Mohammad S. Khajavi、Fatemeh Sefidkon、S. S. Sadat Hosseini
DOI:10.1039/a804314k
日期:——
The synthesis of 3,3-dichloroazetidin-2-ones by the reaction of imines and methyl or trimethylsilyl trichloroacetate promoted by diiron nonacarbonyl or by microwave irradiation of imines and trichloroacetic anhydride is described.
Cycloaddition of substituted 4,4-benzylidene-anilines to in situ prepared dichloroketenes in the presence of dichloroacetyl chloride and triethylamine affords a variety of 2-azetidinones. All the compounds were characterized by IR and H-1 NMR. Their antimicrobial activity, against Gram(+) and Gram(-) bacteria and fungi, was tested. (C) 2000 Elsevier Science S.A. All rights reserved.
The structure of the title compound consists of discrete C16H13C12NO2 molecules with a closest intermolecular contact of 2.54 (3) Angstrom between the carbonyl O atom and a methyl H atom, The four-membered ring is nearly planar, with long C-C distances of 1.564 (5) and 1.537 (5) Angstrom, similar to the distances observed in other substituted monocyclic beta-lactams. The dihedral angle between the planes of the phenyl rings is 78.6(1)degrees.
SEKIYA M.; MORIMOTO T., CHEM. AND PHARM BULL. <CPBT-AL>, 1975, 23, NO 10, 2353-2357
作者:SEKIYA M.、 MORIMOTO T.
DOI:——
日期:——
Bartnik, R.; Lesniak, S., Polish Journal of Chemistry, 1994, vol. 68, # 12, p. 2605 - 2612