13905-97-0Relevant academic research and scientific papers
Synthesis of New Dialkyl 2,2′-[Carbonyl bis (azanediyl)]dibenzoates via Curtius Rearrangement
Yassine, Hasna,Bouali, Jamila,Oumessaoud, Asmaa,Ourhzif, El Mahdi,Hamri, Salha,Hafid, Abderrafia,Khouili, Mostafa,Pujol, Maria Dolors
, p. 1971 - 1979 (2021/01/21)
The 2-(alkylcarbonyl)benzoic acids obtained by esterification of phthalic anhydride are converted into azide derivatives: alkyl 2-[(azidocarbonyl)amino]benzoates and to ureas: dialkyl 2,2′-[carbonyl bis (azanediyl)]dibenzoates. These transformations were carried out using classical Curtius rearrangement conditions in the presence of diphenylphosphoryl azide (DPPA) in a basic medium, followed by hydrolysis. Subsequently, a final condensation reaction of these urea derivatives enabled us to obtain, for the first time, the new alkyl derivatives, alkyl 2-[2,4-dioxo-1,2-dihydroquinazolin-3(4 H)-yl]benzoates. All the new compounds obtained in satisfactory yields were characterized by 1H and 13C NMR, and by X-ray crystallographic analysis.
Structure of the 2-Isocyanatobenzoyl Chloride-Aluminium Chloride (1:2) Complex: Reactions with Some Nucleophiles
Acharya, Baman P.,Rao, Y. Ramachandra
, p. 1133 - 1139 (2007/10/02)
The reactions of 2-isocyanatobenzoyl chloride-aluminium chloride (1:2) complex with methanol, aniline, methyl anthranilate, ethyl anthranilate, 2-aminobenzophenone, 2-amino-5-chlorobenzophenone have been studied.Based on the products obtained in these reactions, the 1:2 complex has been shown to be a mixture of acyclic and cyclic structures (4) and (5) respectively.This is in accordance with the observations recorded in IR studies.
A New Synthesis of 5H,12H-Quinazolinobenzoxazine-5,12-dione
Misra, B. K.,Rao, Y. R.,Mahapatra, S. N.
, p. 485 - 486 (2007/10/02)
5H,12H-Quinazolinobenzoxazine-5,12-dione (2) is obtained by reaction of nitromethane with 2-isocyanatobenzoyl chloride (1) at room temperature in the presence of anhyd. sodium carbonate.A suitable mechanism has been proposed for its formation.
HETEROCYCLIZATION WITH IMINIUM CHLORIDES, II. SYNTHESIS OF 4H--BENZOXAZINE-4-ONES AND QUINAZOLINONES
Bitter, I.,Szoecs, L.,Toeke, L.
, p. 57 - 66 (2007/10/02)
Reactions between methyl anthranilate and a variety of PI salts afforded 2-ammonio-4H--benzoxazine-4-one chlorides which were subjected to nucleophilic reactions.With primary amines, 2-ureidoanthraniloyl amides were obtained, which were smoothly cyclized in boiling acetic anhydride or dimethylformamide to give 1H,3H-quinazoline-2,4-diones.
