Flavonoids. 41. Stereospecific synthesis of 2,3-dihydro-c-3-substituted-t-3-methyl-r-2-phenyl-4H-1-benzopyran-4-ones |
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| Authors: | Tams Patonay Erzsbet Patonay-Pli Gyrgy Litkei Lszl Szilgyi Gyula Batta Zoltn Dinya |
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| Institution: | Tamás Patonay,Erzsébet Patonay-Péli,György Litkei,László Szilágyi,Gyula Batta,Zoltán Dinya |
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| Abstract: | The synthesis of 2,3-dihydro-t-3-mesyloxy-c-3-methyl-r-2-phenyl-4H-1-benzopyran-4-one (1) is described. The reaction of mesylate 1 with various nucleophiles, first of all O- and N-nucleophiles, yields the corresponding 2,3-dihydro-c-3-substituted-t-3-methyl-r-2-phenyl-4H-1-benzopyran-4-ones 2b, 7b, 9, 10, 12, 14 and 18 . Azide 14 is a useful intermediate for the synthesis of flavonoids 15–17 . |
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