名称:
Synthesis of 9-azolyl-3-(4-phenyl-4h-1,2,4-triazol-3-yl)-4h,8h-pyrano-[2,3-f]chromene-4,8-diones
摘要:
The reaction of 6-ethyl-8-formyl-7-hydroxy-3-(4-phenyl-4H-1,2,4-triazol-3-yl) chromone with 2-azolylacetonitriles gave 8-iminopyrano[ 2,3-f] chromen-4-ones, whose acid hydrolysis led to pyrano[2,3-f] chromene-4,8-diones containing azaheterocyclic substituents at C-3 and C-9.