SYNTHESIS OF 15<i>H</i>-ISOQUINO[2′,3′:3,4]IMIDAZO[2,1-<i>B</i>]QUINAZOLINE-7,13,15-TRIONES AND 14<i>H</i>-ISOQUINO[2′,3′:3,4]IMIDAZO[2,1-<i>B</i>]BENZO[<i>G</i>]QUINAZOLINE-8,14,16-TRIONE AS NEW POLYCYCLIC FUSED-RING SYSTEMS
作者:Ahmed I. Khodair、Jean-Pierre Gesson、El-Sayed H. El-Ashry
DOI:10.1080/104265090507533
日期:2004.12.1
3-Thioxo-2H-imidazo[1,5-b]isoquinoline-1,5-dione (3) and 2-substituted-3-thioxo-2H-imidazo[1,5-b]isoquinoline-1,5-diones(4a-l) were prepared from the reaction of 2-thioliydantoin. (2) and 3-substituted 2-thiohydantoin (5a-l) with 2-formyl benzoic acid (1). Alkylation of 3 under an anhydrous basic conditions afforded 4a-i. The alkylation of 3 in. aqueous basic solution, afforded 3-(alkyl-mercapto)imidazo[1,5-b]isoquinoline-1,5-diones (7a,b). Reactions of the aromatic amino acids 9a,b and 12 with 7a afforded 2-(2H-1,5dioxoimidazo[1,5-b]isoquinazolin-3-ylideneamino)benzoic acids (10a,b) and 3-(2H-1,5-dioxoimidazo[1,5-b]isoquinazolin-3-ylideneamino)-2-naphthalenecarboxylic acid (13), which were then cyclyzed by heating in acetic anhydride to afford 15H-isoquino[2',3':3,4]-imidazo[2,1-b]quinazoline-7,13,15-triones (11a,b) and 14H-isoquino[2',3':3,4]imidazo[2,1-b]benzo[g]quinazoline-8,14,16-trione (14). Some of the new compounds were tested for their antitumor activities.