## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Convenient synthesis of fused pyrano[3,2-h]- and furo[3,2-h]benzo[f]coumarins from naphthalene-2,3-diol
โ Scribed by Konstantinos E. Litinas; Theodoros S. Symeonidis
- Book ID
- 108283199
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- French
- Weight
- 213 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0040-4020
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๐ SIMILAR VOLUMES
## Abstract magnified image Furocoumarins **3,5** and pyranocoumarin **7** were synthesized from the reaction of furonaphthalenediones **2,4** and pyranonaphthalenedione **6** respectively with carbethoxymethylene(triphenyl)phosphorane in refluxing DCM for 3โ6 hours or under microwave irradiation
## Abstract 2โMethylโ3__H__โindoles 1 cyclize with two equivalents of ethyl malonate **2** to form 4โhydroxyโ11__H__โbenzo[__b__]pyrano[3,2โ__f__]indolizinโ2,5โdiones 3, whereas 2โmefhylโ2,3โdihydroโ1__H__โindoles **9** give under similar conditions regioisomer 8โhydroxyโ5โmethylโ4,5โdihydroโpyrrol