The reaction of hexafluoroacetone with aliphatic ortho esters, other than orthoformates, has been found to afford the hydroxy esters 111. The reaction of hexafluoroacetone with the cyclic ortho ester 2-methyl-2-ethoxy- l13-dioxolane gives the hydroxy ketal ester IV. Evidence in support of these structures has been obtained from infrared, proton nmr, and mass spectre1 data. ... In earlier papers we described the reaction of hexa- fluoroacetone with orthoformates. lt2 ...
