Description
This simple carbazole alkaloid is found in the stem bark of Mu"aya koenigii
Spreng. It is best purified by sublimation of the crude base when it yields colour_x0002_less crystals. The ultraviolet spectrum in ethanol has absorption maxima at 238,
247,274,289 and 335 mJJ.. The structure has been shown to be 3-formyl-lmethoxycarbazole by spectroscopic methods and synthesis. It yields an oxime,
m.p. l55-6°C; a picrate, m.p. 198-2000 C and the 2:4-dinitrophenylhydrazone,
m.p. > 300°C. The N-methyl derivative forms colourless needles from C6H6-
light petroleum, m.p. l48-9°C. When subjected to Wolff-Kishner reduction, the
alkaline phase yields l-hydroxy-3-methyl-carbazole.
References
Chakraborty, Barman, Bose., Tetrahedron, 21, 681 (1965)
Synthesis:
Crum, Sprague., Chern. Cornrnun., 417 (1966)
Chakraborty, Chowdhury., J. Org. Chern., 33, 1265 (1968)
