| Autor: |
Rostovsky, E. N., Barinova, A. N., Volkova, A. I. |
| Zdroj: |
Russian Chemical Bulletin; November 1957, Vol. 6 Issue: 11 p1396-1402, 7p |
| Abstrakt: |
Summary 1.Vinyl isobutyrate, vinyl isovalerate and vinyl caproate were synthesized from acetylene and the corresponding acids by the heterogeneous catalytic, vapor-phase method. It was established that the useful conversion of acids in these reactions attains 90–95% of the theoretical when calculated on the acid consumed, and 70–90% when calculated on the acid introduced. Vinyl Isovalerate has not previously been described.2.Vinyl isobutyrate can be satisfactorily prepared not only by the vapor-phase method but also by the method of acidolysis of vinyl acetate.3.It was established that the most suitable method of preparation of vinyl caproate, and probably also of esters of the nearest homologs of caproic acid with a larger number of carbon atoms, is the heterogeneous catalytic method, which avoids contamination with ethyiidene esters. The latter considerably complicate the purification of vinyl caproate.4.Experiments on reaction of vinyl acetate with acetic acid in presence of mercury catalyst showed that the addition reaction can take place with considerable velocity.5.Secondary reactions are discussed with reference to me expediency of employing a given method to obtain maximum useful conversion of the acid and to the possibility of isolation of the ester in the pure form. |
| Databáze: |
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