J. V. Janovsky and L. Erb, Brr. 19, 2155 (1886)
Akatsuka, J. Pharm. Soc. Japan 80. 389 (1960)
Foster, Mackie, Tetrahedron 18, 1131 (1962)
Pollitt, Saunders, J Chem. Soc. 1965, 4615.

See also Zimmermann Reaction..

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