Bucherer Carbazole Synthesis
H. T. Bucherer and F. Seyde, J. Prakt. Chem. [2] 77, 403 (1908)
Reviews. Drake in Organic Reactions 1, p 114 (New York, 1942)
Hollins, The Synthesis of Nitrogen Ring Compounds p 171 (London, 1924)
Mechallism: Rieche, Seeboth, Ann. 638, 43-110 (1960)
Seeboth, Rieche, ibid. 671, 77 (1964)
Seeboth et al., ibid. 683, 85-99 (1965)
Also see Borsche-Drechsel Cyclization.