title: [Synthesis of potential CCK antagonist quinazolone derivatives. II].
abstract: An alternative route has been developed for the synthesis of [1,4]diazepino[3,4-b]quinazolones (2), a new ring system of heterocondensed quinazolones. 2,3-Bifunctional quinazolones (4) were synthesized by halogenation of 2-alkyl-quinazolone-3-propionic acids, yield from the reaction of 2-alkyl-benzoxazone (3) with beta-alanine. The reaction of haloalkyl compounds (5,6) with N-nucleophiles produces [1,4]oxazepino-[3,4-b]quinazolones (8), a new heterocyclic ring system, and 3-[2'-hydroxi-ethyl-, or 3-[2'-chloro-ethyl-4' oxo(3'H)-quinazoline-3'-yl]propionamides (7, 9) in consecutive reaction. The cyclisation of 2-aminoalkyl-3-propionates (13) resulted in the title compounds (14). Physical data and properties of the newly synthesized compounds such as IR, UV and NMR spectra were obtained for all compounds reported.
mesh_terms: D002766:Cholecystokinin / Q000037:antagonists & inhibitors*; D007202:Indicators and Reagents; D015394:Molecular Structure; D011799:Quinazolines / Q000138:chemical synthesis* / Q000737:chemistry; D013329:Structure-Activity Relationship
chemical_list: D007202:Indicators and Reagents; D011799:Quinazolines; D002766:Cholecystokinin
vernacular_title: Potenciális CCK-antagonista kinazolon-származékok szintézise II.