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The Reaction of 4-Oxo-4H-[1]benzopyran-3-carbaldehyde with 1,2-Benzenediamine. X-Ray Structure Analysis of the Reaction Product

✍ Scribed by Grety Rihs; Ivo Sigg; Georges Hass; Tammo Winkler

Publisher
John Wiley and Sons
Year
1985
Tongue
German
Weight
126 KB
Volume
68
Category
Article
ISSN
0018-019X

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✦ Synopsis

Base1 (26.VIII.85) The reaction product of 4-oxo-4H-[l]benzopyran-3-carbaldehyde and 1,2-benzenediamine is 1,8-dihydro-6,13-bis(2-hydroxybenzoyl)dibenzo[b,i]-l,4,8,1l-tetraazacyclotetradeca-4,6,11,13-tetraene (l), and its dehydrogenation product is 3-(2-benzimidazolyl)-4H-[l]benzopyran-4-one (2) as shown by X-ray structure analysis confirming our earlier report. ') Atomic coordinates and bond lengths for 1 and 2 are available from the Crystallographic Data Centre, Cambridge (UK).

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