G. Kolavi, V. Hegde, I. Khazi
Apr 17, 2006
Citations
0
Influential Citations
26
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Novel heterocyclic systems 2-alkyl/aryl-9-(2-hydroxybenzylidene)-7,9-dihydro-8 H -[1,3,4]thiadiazolo[2′,3′:2,3]imidazo[4,5- d ][1,2]diazepin-8-one and 9-(2-hydroxy-benzylidene)-3,3-dimethyl-3,4,7,9-tetrahydro-2 H -11-thia-4 b ,6,7,10-tetraazaindeno[1,2- a ]azulene-1,8-dione are synthesized via an intramolecular amidation reaction. An interesting ring opening and cyclization of 2-alkyl/aryl-6-(2-oxo-2 H -chromen-3-yl)imidazo[2,1- b ][1,3,4]thiadiazole-5-carbaldehyde and 6,6-dimethyl-8-oxo-2-(2-oxo-2 H -chromen-3-yl)-5,6,7,8-tetrahydroimidazo[2,1- b ][1,3]benzothiazole-3-carbaldehyde are discussed.