Schmidlin Ketene Synthesis.
J. Schmidlin and M. Bergman, Ber. 43, 2821 (1910)
H. Staudinger, Die Ketene, p 21 (Stuttgart, 1912)
J. Al, Angew. Chem. 45, 545 (1932)
J. W. Williams and C. D. Hurd, J. Org. Chem. 5, 122 (1940)
W. E. Hanford and J. C. Sauer, Organic Reactions 3, 109, 132 (1946)
G. Quadbeck, Angew. Chem. 68, 361 (1956)
L. F. Fieser and M. Fieser, Advanced Organic Chemistry, p 389 (New York, 1961)
Cf. Wilsmore Ketene Synthesis, Wolff Rearrangement.