## Abstract Benzo[b]thiopheneβ2,3βdiones (**1**) react with __Grignard__ reagents to yield 2,3βdihydroxyβ2,3βdiaryl(aralkyl)benzo[b]βthiophenes (**2**). The latter compounds yield 3,3βdiaryl(aralkyl)βbenzo[b]thiopheneβ2βones (**3**) by pinacolone rearrangement. Treatment of **3** by hot ethanolic s
Reaction with benzo[b]thiophene-2,3-dione A Novel Synthesis of Thiocoumarin Derivatives
β Scribed by Mohamed Mohamed Mohamed Sallam; Mahmoud Ali Ibraheim; Prof. Dr. Mohamed Hilmy Elnagdi; Dr. Kamal Usef Sadek
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 241 KB
- Volume
- 327
- Category
- Article
- ISSN
- 1615-4150
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Rcgiosclcctive synthesis of hitherto unreported pyrano[3,2-/]benzo [b]thiophme derivatives (Sa-f) in 90-95 % yields are reported by the application of a less studied rearrangemont of 6-(4-aryloxybut-2-ynylthio)[ 1 ]benzopyran-2-unes (fat-f) via oxidation with m-chioroparoxybenzoic acid followed by t
An efficient synthesis of novel spiro 2,3,7,8-tetrahydro-benzo[1,2-b:5,4-b 0 ]dipyran-4,6-dione and 2,3,8,9tetrahydro-benzo[1,2-b:4,3-b 0 ]dipyran-4,10-dione derivatives in high yields under microwave irradiation is described. The reaction was also studied under conventional heating conditions.