... Tetrahedron Letters. ... 9 and 10 In the following Letter, we describe a direct route to fluorinated ketones using the Houben–Hoesch reaction and fluorinated nitriles. ... (e) W. Ruske; (e) GA Olah (Ed.), Friedel-Crafts and Related Reactions, Vol. 3, Interscience, New York (1964), pp. ...