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2005
Pyridazine derivatives
R 0500
Investigations of a Novel Process to the Framework of Benzo[c]cinnoline. —
reaction conditions which allow formation of either benzo[c]cinnoline or ben11- 158 Optimal
zo[c]cinnoline N-oxide in high yields are developed. Some functional groups are tolerated, but OH, NH2, CN, CHO, and COMe substituents are not compatible with these
conditions. Additionally, an intermolecular version of this process is studied. However,
only small amounts of the desired diphenyldiazenes (VI) are obtained. —
(BJOERSVIK*, H.-R.; GONZALEZ, R. R.; LIGUORI, L.; J. Org. Chem. 69 (2004)
22, 7720-7727; Dep. Chem., Univ. Bergen, N-5007 Bergen, Norway; Eng.) —
Jannicke
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