
TY  - JOUR
A1  - Badger, GM 
A1  - Joshua, CP 
A1  - Lewis, GE 
T1  - Photochemical reactions of azo compounds. V. Photochemical cyclodehydrogenations of Amino-, Acetyl-, and Nitro-azobenzenes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1965
VL  - 18
IS  - 10
SP  - 1639
EP  - 1647
KW  - 
UR  - https://doi.org/10.1071/CH9651639 
N2  - 4-Benzdaminoazobenzene and 4,4'-bisbenzalaminoazobenzene have been shown to undergo photochemical cyclodehydrogenation in concentrated (98%) sulphuric acid to give 2-aminobenzo[c]cinnoline and 2,9-diaminobenzo[c]cinnoline respectively in excellent yields; but 4-aminoazobenzene and 4,4'-diaminoazobenzene were not cyclized. 3-Arninoazobenzene and 3-benzalaminoazobenzene both gave 3-aminobenzo[c]cinnoline. 3-Nitro- and 3-acetyl-azobenzenes gave 3-nitro- and 3-acetyl-benzo[c]cinnolines; and 4-nitro- and 4-acetyl-azobenzenes gave 2-nitro- and 2-acetyl-benzo[c]cinnolines. 
ER  -

