Duff Reaction.
J. C. Duff and E. J. Bills, J. Chem. Soc. 1932, 1987; 1934, 1305
J. C. Duff, ibid. 1941, 547; 1945, 276.
Ferguson, Chem. Revs. 38, 230 (1946)
Bayer in Houben-Weyl's Methoden der Organischen Chemie vol. 7/1, p 198(1954)
Seshadri et al., C.A. 44, 5875, 9960 (1950)
Also see Ciamician-Dennstedt Rearrangement , Reimer-Tiemann Reaction