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4aH-Carbazole

Thermal or photochemical extrusion of nitrogen from 1-arylbenzotriazoles (26) leads to the formation of carbazoles (29) (Scheme 2). The mechanism is believed to involve cyclization of a diradical (27b) or an iminocarbene (27c) to the 4aH-carbazole (28) followed by an aromatizing hydrogen shift. [Pg.370]

Scheme 2. Benzo derivatives of 4a-methyl-4aH-carbazole have...

See other pages where 4aH-Carbazole is mentioned: [Pg.263] [Pg.93] [Pg.1144] [Pg.428] [Pg.164] [Pg.682] [Pg.263] [Pg.93] [Pg.1144] [Pg.428] [Pg.164] [Pg.682] [Pg.1256]