Flavonoids—II
| Autor: | M.J. Byrne, K.G. Marathe, R.N. Vidwans |
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| Rok vydání: | 1966 |
| Předmět: | |
| Zdroj: | Tetrahedron. 22:1789-1795 |
| ISSN: | 0040-4020 |
| DOI: | 10.1016/s0040-4020(01)82252-3 |
| Popis: | Isoaurones (anhydrolactones of 2-hydroxy-α-benzylmandelic acids), trimethylanhydrohazeyl lactone 2a and its 5-methyl-4′-methoxy analogue (VI) are shown to be trans -stilbene derivatives and are isomerized to cis -compounds by pyridine. The stereochemistry has been established by a stereoselective synthesis of the derived cis -stilbene-α-carboxylic acid VII (R = CH 3 , R′ = H) and confirmed by UV and NMR studies. A mechanism for isomerization has been suggested. |
| Databáze: | OpenAIRE |
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