Archiv der Pharmazie p. 319 - 321 (1993)
Update date:2022-08-04
Topics:
Ambrosi
Kunath
Jahnisch
Phthalylglycyl chloride (1) reacts with benzalaniline (3) in the presence of triethylamine to yield 1,4-diphenyl-3-phthalimido-azetidin-2-one (5). The selectivity of formation of cis-β-lactam 5 was improved considerably by decreasing the concentration of chloride in the reaction-solution and by lowering of the temperature. Hydrazinolysis of 5 yields 3-amino- 1,4-diphenyl-azetidin-2-one (8).
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