Oxazolines

Details Oxazolines Oxazolines

C - Chemistry, Metallurgy

07

D

260/298.2, 260/2

C07D 498/04 (2006.01) C07D 499/00 (2006.01) C07D 505/00 (2006.01)

Patent

CA 1090806

OXAZOLINES ABSTRACT Useful intermediates of the following formula: Image (wherein R is a monovalent group of acyl-minus-carbonyl derived from a carboxylic or carbonic acyl; COB is carboxy or protected carboxy; and X is hydrogen or a nucleophilic group) for the synthesis of 1-oxadethiacephalosporins are preparable from the corresponding penicillin 1-oxides of the formula: Image (wherein R, COB, and X are as defined above) by heating, if required in the presence of a desulfurizing reagent or by changing the X group with another one under the condition of an nucleophilic substitution.

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