G. Rihs, I. Sigg, G. Hass
Nov 13, 1985
Citations
0
Influential Citations
25
Citations
Journal
Helvetica Chimica Acta
Abstract
The reaction product of 4-oxo-4H-[1]benzopyran-3-carbaldehyde and 1,2-benzenediamine is 1,8-dihydro-6,13-bis(2-hydroxybenzoyl)dibenzo[b,i]-1,4,8,11-tetraazacyclotetradeca-4,6,11,13-tetraene (1), and its dehydrogenation product is 3-(2-benzimidazolyl)-4H-[1]benzopyran-4-one (2) as shown by X-ray structure analysis confirming our earlier report.