## Abstract In order to examine the importance of Sommelet and Stevens rearrangement versus β‐elimination, the reaction of sodium amide in liquid ammonia on 1‐methyl‐benzylpiperidinium iodide was examined and found to give three isomeric tertiary bases: two of them resulting from a Sommelet rearran
Contribution A L'Étude de L'Action des Bases Sur les Sels D'Ammonium Quaternaires. II – Réarrangement de L'Iodure de 1-Méthyl-1-Benzylpyrrolidinium
✍ Scribed by L. P. A. Fery; L. van Hove
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2010
- Weight
- 672 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0037-9646
No coin nor oath required. For personal study only.
✦ Synopsis
The reaction of sodium amide in liquid ammonia on l-methyl-l-benzylpyrrolidinium iodide was examined and found to give two isomeric tertiary bases: one of them (yield 86%) results from a Sommelet rearrangement, the other (yield 5%) is formed through a Stevens rearrangement.
Dans un article pricedent (I), nous avons rendu compte de notre etude de l'action de bases diverses sur l'iodure de l-mithyl-lbenzyl-piperidinium (1). Ce sel, en prisence de l'amidure de sodium dans l'ammoniac liquide, donne lieu a la formation de trois amines tertiaires isombres (111, V et VII) : deux de ces ainines (111 et V) se sont formtes B la suite de transpositions du type Sommelet, tandis que la troisibme (V11) risulte d'une transposition du type Stevens. Selon l'interpritation ginirale du micanisme de ces riarrangements proposee par C.R. Hauser ( 2 ) , les reactions se produiraient comme l'indique le schema ci-dessous.
En vue d'ktudier l'influence de la structure de l'heterocycle azoti sur 1'Cvolution de la reaction, nous avons entrepris un travail semblable sur l'iodure de 1 -mithyl-1 -benzylpyrrolidinium (VIII), homologue infirieur du sel (I).
📜 SIMILAR VOLUMES
Reaction of 2-methyl-2-benzyl-l,2,3,4-tetrahydroisoquinolinium iodide with sodium amide in liquid ammonia yields 76% l-orthotolyl-2-methy1-1,2,3,4-tetrahydroisoquinoline resulting from a Sommelet-Hauser rearrangement. In the same conditions, 2,2-dimethyl-1,2,3,4-tetrahydroisoquinolinium iodide yield
The two compounds were labelled by ^14^C on the hydroxyimino methyl group substituted on the 2 positions of the pyridinium ring. The convenient pyridinium lithiated intermediates were formylated with N‐methyl ^14^C‐formanilide. The hydroxyimino methyl groups were synthezised by reaction of the ^14^