Alphasulfonyloxyketone acetals

Details Alphasulfonyloxyketone acetals Alphasulfonyloxyketone acetals

C - Chemistry, Metallurgy

07

D

260/321, 260/626

C07D 317/56 (2006.01) C07D 209/46 (2006.01) C07C 143/68 (1980.01)

Patent

CA 1186319

ABSTRACT OF THE DISCLOSURE The invention provides alphasulfonyloxyketone acetals of the general formula Image (II) wherein R3 and R4, independently from each other,represent an alkyl group, or taken together, represent an alkylene group; R5 represents a substituted or unsubstituted alkyl group or an aromatic group; and Ar represents an aromatic group and R1 represents a hydrogen atom or a saturated aliphatic group, or Ar and R1 form a condensed ring together with the carbon atom to which they are bonded. The acetals can be hydrolyzed, or treated with an agent having affinity for oxygen, to yield an alpha-aromatic group substituted alkanoic acid or its ester of the general formula Image (I) wherein Ar and R1 are as defined above and R2 represents a hydrogen atom, an alkyl group or a hydroxyalkyl group.

454627

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