91658-90-1Relevant academic research and scientific papers
Metal-free synthesis of benzimidazo[1,2-c]quinazolin-6-ones with indole and benzenediamine oxidized by I2/TBHP
Dai, Zhen,Li, Songhua,Li, Yunyi,Feng, Lei,Ma, Chen
, p. 2012 - 2017 (2019/02/20)
A variety of benzimidazo[1,2-c]quinazolin-6-ones derivatives can be accessed in moderate to good yields under simple and metal-free reaction conditions using indoles and o-benzenediamines oxidized by iodine and TBHP. This procedure works in reasonable yields for different indoles as well as o-benzenediamines thus may provide a good synthesis of quinazolinones. A TBHP oxidized ring expansion reaction mechanism that explains the synthesis of benzimidazo[1,2-c]quinazolin-6-ones were reported.
CONDENSATION OF o-PHENYLENEDIAMINE WITH α-DIKETONES. PREPARATION AND PHOSPHORYLATION OF NEW α-DIKETONE MONOANILS
Hafez, Taghrid S.
, p. 341 - 349 (2007/10/02)
Condensation of o-phenylendiamine 5 with N-methylisatine 4b and with benzocoumaranedione 12 under different conditions was studied.Monoanils N-methyl-3-(2-aminophenylimino)-indoline-2-one 6b and benzocoumaran-3-(2-aminophenylimino)-2-one 13 were isolated.Dimethyl phosphite add to anils 6b and/or 13 to give the corresponding quinoxalines 7 and 14 respectively.On the other hand, diethyl phosphite add to carbonyl-oxygen double bond in compounds 6b & 13 to give the respective phosphate adducts 16 & 17a.Structural reasonings are based on chemical and spectroscopic results. Key words: α-Diketones; a-diketone monoanils; schiff base; quinoxaline; dialkyl phosphites; phosphates.
REACTION OF o-PHENYLENEDIAMINE WITH ISATINS
Ivashchenko, A. V.,Drushlyak, A. G.,Titov, V. V.
, p. 537 - 542 (2007/10/02)
It is shown that the reaction of o-phenylenediamine with isatins in the general case leads to mixtures of indoloquinoxalines, 3-(2'-aminophenyl)-2(1H)-quinoxalinones, and spiro.Spiro2H-benzimidazole-2,3'-in
