| Autor: |
Raifel'd, Yu. E., Él'yanov, B. S., Makin, S. M. |
| Zdroj: |
Russian Chemical Bulletin; May 1976, Vol. 25 Issue: 5 p1058-1061, 4p |
| Abstrakt: |
1.The diene condensation of 1-alkoxy-1,3-butadienes with aliphatic aldehydes at high pressures leads to predominate formation of 2-alkoxy-6-alkyl-?3-dihydropyrans, corresponding to the endo-orientation of the diene and dienophile in the transition state.2.The observed effect is explained by the presence of interaction of the partially protonated hydrogen on the a-carbon atom of the aldehyde with the p-system of the diene. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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