Reactive 4a-alkyl-4aH-carbazoles by catalytic dearomatisation, and their unusual dimerisation and dealkylation reactions
作者:Robin B. Bedford、Craig P. Butts、Mairi F. Haddow、Robert Osborne、Rosalind F. Sankey
DOI:10.1039/b910894g
日期:——
Despite their intrinsic instability, 4a-alkyl-4aH-carbazoles can be generated by a catalytic dearomatisation process; their reactivity is demonstrated by facile dealkylation and highly unusual cyclodimerisation processes.
作者:Janusz J. Kulagowski、Christopher J. Moody、Charles W. Rees
DOI:10.1039/c39820000548
日期:——
Thermal and photochemical decomposition of benzotriazoles (3) gives carbazoles (4) and (5), and cyclopentaquinolines (6), the formation of these products being rationalised by rearrangements in 4aH-carbazole intermediates (7); one proposed intermediate (11c) has been intercepted in an extended cycloaddition reaction with acrylonitrile.