| Autor: |
Skvortsov, I. M., Kolesnikov, S. A., Samitov, Yu. Yu., Shcherbakova, G. D. |
| Zdroj: |
Chemistry of Heterocyclic Compounds; August 1977, Vol. 13 Issue: 8 p877-883, 7p |
| Abstrakt: |
Mixtures of isomeric 5-, 6-, and 7-carbethoxymethyl-1,2-dihydropyrrolizines were obtained by reaction of 1,2-dihydropyrrolizines with ethyl diazoacetate. The effect of the position of the alkyl groups in the two-membered ring on the ratio of isomers in the reaction products is demonstrated. A method for the isolation of 5-carbethoxymethyl-1,2-dihydropyrrolizines from the mixtures of isomers based on the difference in their reactivities in diazo coupling is described. The preferred conformations of the two-membered rings in the 5-carbethoxymethyl-1,2-dihydropyrrolizines are judged from the PMR spectral data. |
| Databáze: |
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| Externí odkaz: |
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