Synthesis of some benzopyranoquinoline derivatives

Authors
Mulwad, VV Mahaddalkar, BS
Citation
Vv. Mulwad et Bs. Mahaddalkar, Synthesis of some benzopyranoquinoline derivatives, I J CHEM B, 38(1), 1999, pp. 29-32
Citations number
7
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY
ISSN journal
03764699 → ACNP
Volume
38
Issue
1
Year of publication
1999
Pages
29 - 32
Database
ISI
SICI code
0376-4699(199901)38:1<29:SOSBD>2.0.ZU;2-Q
Abstract
4-Chlorocoumarins on condensation with anthranilic acid afford 4-(2'-carbox yphenylamino)-2H-(1)-benzopyran-2-ones 1 which on cyclisation with polyphos phoric acid yield 7,12-dihydro-6H-[1]benzopyrano[4,3-b]quinoline-6,7-diones 2. Compounds 1 on treatment with phosphoryl chloride yield 7-chlorobenzopy rano[4,3-b]quinolin-6(H)-ones 3. These chloro compounds on further treatmen t with various aromatic amines yield 7-anilinobenzopyrano[4,3-b]quinolin-6( H)-ones 4.