The condensation products of 6-methoxy-2,3-dihydro-4H-benzopyran-4-one and 6-nitroveratraldehyde. Part I
β Scribed by George C. Wright
- Book ID
- 112123904
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1976
- Tongue
- English
- Weight
- 138 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0022-152X
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The title reactions furnished the pyran ring cleaved product (3) and the tetracyclic chromene (5), rather than the expected 4-cyclicamido-3hydroxy benzopyrans (l,R=CN and NO2, respectively, n=ll). Mechanisms proposed for these reactions require a strong electron withdrawing group at C(6) in the benz