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Thermal decomposition reactions of n ‐alkylated 2‐aminobiphenyls to carbazole and phenanthridine
Author(s) -
Creencia Evelyn Cuevas,
Horaguchi Takaaki
Publication year - 2006
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570430605
Subject(s) - phenanthridine , chemistry , carbazole , alkylation , dehydrogenation , thermal decomposition , phenanthrene , pyrolysis , nitrogen , oxide , medicinal chemistry , organic chemistry , photochemistry , catalysis
Thermal cyclization reactions were examined by passing vapors of N ‐alkylated 2‐aminobiphenyls 1a‐c and 2 over calcium oxide at 450‐600°C under nitrogen carrier gas. The reactions yielded 9‐methylcarbazole 3 , carbazole 4 , phenanthridine 5 and phenanthrene 6. The major product for the reactions of 1a, 1b and 2 was phenanthridine 5 while that of 1c was carbazole 4.