Triethyl phosphite mediated synthesis of indazoloquinazolinoperimidines, oxadiazoloindazoles and thiadiazoloindazoles
2-(2-Aminophenyl)perimidine (1) on treatment with 2-nitrobenzaldehydes (2) in acetic acid gives 5,6-dihydro-6-(2-nitroaryl)quinazolinoperimidines (4) which on permanganate oxidation yield 6-(2-nitroaryl)quinazolinoperimidines (5). 5-on triethylphosphite (TEP) mediated deoxygenative cyclisation afford indazoloquinazolinoperimidines (6).Similarly, 5-aryl-2-(2-nitrophenyl)oxadiazoles (9) and 2-arylamino-5-(2-nitrophenyl)thiadiazoles (14) on treatment with TEP give 2-aryloxadiazoloindazoles (10) and2-(N-ethylarylamino)thiadiazoloindazoles (16) respectively.
Reddy, V Rama Kishan,Reddy, P S N,Ratnam, C V
p. 499 - 502
(2007/10/02)
A Facile Synthesis of 2-Aryl-3,4-dihydro-5H-1,3,4-benzotriazepin-5-ones
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Reddy, Ch. K.,Reddy, P. S. N.,Ratnam, C. V.
p. 842 - 844
(2007/10/02)
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