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Thermolysis of 3‐azidophenalen‐1‐ones to naphtho[8,1‐ ab ]carbazolones and naphtho[8,1‐ ab ]‐8a‐azonia‐9‐λ 2 ‐azafluoren‐7‐ones
Author(s) -
Fischer Michaela,
Stadlbauer Wolfgang
Publication year - 1997
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.5570340344
Subject(s) - chemistry , thermal decomposition , medicinal chemistry , computational chemistry , organic chemistry
3‐Azido‐1‐phenalenones 4 with aryl‐ or hetarylsubstituents in position 2 cyclized by thermolysis to give naphtho[8,1‐ ab ]carbazolones 5 or naphtho[8,1‐ ab ]‐8a‐azonia‐9‐λ 2 ‐azafluorenones 7. Reduction of the azides 4 gave the corresponding amino derivatives 9. The thermolysis conditions were studied by differential scanning calorimetry.