Unexpected behaviour of the oxidizing agent sodium m-nitrobenzenesulfonate: Synthesis of a new class of 5-hydroxy benzopyrano-[4,3-c]pyridazin-3(2H)-ones
β Scribed by Giorgio Cignarella; Daniela Barlocco
- Book ID
- 112131125
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1995
- Tongue
- English
- Weight
- 123 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0022-152X
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## Abstract Derivatives **7**β**13** of a new tricyclic heteroaromatic system, pyrido[3β²,2β²:5,6]thiopyrano[4,3β__c__]pyridazinβ3(2__H__,5__H__)βone, were prepared as potential ligands at the benzodiazepine receptor, in view of their structural analogy with potent ligands such as the pyrazoloquinoli
## Abstract We hereby report the first preparation of the 5,6βdihydroβ4__H__βfuro[2,3β__c__]pyrrolβ4βone (**3**) and its derivatives starting from methyl 3β(methoxycarbonyl)furanβ2βacetate (**8**). The ester functionality connected to the methylene group was regiospecifically converted to the desir