Unusual conversion of substituted-3-formylchromones to 3-(5-phenyl-3H-[1,2,4]dithiazol-3-yl)chromen-4-ones: a facile and efficient route to novel 1,2,4-dithiazoles

Autor: Vivek K. Gupta, Mohan Paul S. Ishar, Priyanka Kanwal, Gurpinder Singh, Ajay Pal Singh Pannu, Tilak Raj
Rok vydání: 2008
Předmět:
Zdroj: Tetrahedron Letters. 49:243-246
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2007.11.081
Popis: Substituted 3-formylchromones react with 2-phenyl-4-dimethylamino-1-thia-3-azabuta-1,3-diene ( 4 ) or thio-benzamide ( 7 ) by heating their toluene solution in a sealed tube to give novel substituted 3-(5-phenyl-3 H -[1,2,4]dithiazol-3-yl)chromen-4-ones ( 6a – e ) in high yields.
Databáze: OpenAIRE