Summary.
Arylimines of 2-acetylthiophene and 2-, 3-, and 4-acetylpyridines react with ketenes yielding 4-heterosubstituted β-lactams. Reactions of imines with ketenes were proved to be diastereoselective. The stereochemistry of the products was confirmed by X-ray analysis. β-Lactams treated with Lawesson’s reagent gave β-thiolactams.
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Krasodomska, M., Serda, P. Staudinger Reaction of Schiff Bases of Acetylthiophene and Acetylpyridine with Ketenes. Diastereoselective Synthesis of 4-Heterosubstituted β-Lactams and their Conversion to β-Thiolactams. Monatsh. Chem. 138, 199–204 (2007). https://doi.org/10.1007/s00706-007-0588-3
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DOI: https://doi.org/10.1007/s00706-007-0588-3