Synthetic reactions of 2-(2-amino-3-cyano-4H-[1]benzopyran-4-yl)propane-1,3-dinitrile with reactive methylene compounds
β Scribed by O'Callaghan, Conor N.; McMurry, T. Brian H.; O'Brien, John E.
- Book ID
- 119959039
- Publisher
- Royal Society of Chemistry
- Year
- 1995
- Weight
- 409 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1472-7781
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## Abstract magnified image The title aldehyde **1** reacts smoothly with the enamine moiety of **2**βaminochromone **2** to produce hitherto unreported 3β(2βhydroxybenzoyl)β5__H__β1βbenzopyrano[2,3β__b__]pyridinβ5βone (azaxanthone) **5**. This reaction has been extended for the synthesis of bisaz
Reaction of 3,2, 6, benzopyran with either organolithium reagents or magnesium generates the novel strained alkyne, 3,4-didehydro-2H-[1]benzopyran. Cycloaddition with furans gives access to the dibenzo[b,d]pyran system.