Conversion of 6α-alkoxyformamidopenicillanates into 6α-aminopenicillanates, and the formation of 6-spiropenicillanates
Abstract
Methyl 6β-phenoxyacetamido-6α-trichloroethoxyformamidopenicillanate has been converted into a 6α-aminopenicillanate; 6α-ethoxyformamido-6β-phenoxyacetamidopenicillanates reacted with phosgene and base to afford unique (1-ethoxycarbonyl-3-phenoxyacetyl-2-oxo-1,3-diazetidine)-4-spiro-6′-penicillanates.