## Abstract An improved synthesis of 2‐quinuclidine carboxylic acid is described.
Untersuchungen in der Chinuclidin-Reihe. 2. Mitteilung. 4-Chinuclidin-carbonsäure
✍ Scribed by C. A. Grob; E. Renk
- Publisher
- John Wiley and Sons
- Year
- 1954
- Tongue
- German
- Weight
- 549 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Consecutive C‐ and N‐alkylation of 1‐methyl‐4‐cyano‐piperidine (I) with 1,2‐dichloro‐ethane affords 1‐methyl‐4‐cyano‐quinuclidinium chloride (III). Upon heating this salt is converted into 4‐cyanoquinuclidine (IV), from which 4‐quinuclidine‐carboxylic acid is obtained after hydrolysis.
📜 SIMILAR VOLUMES
Die beiden vorangegangenen Mitteilungen dieser Reihe befassten sich mit der Herstellung und den Eigenschaften der 4-Chinuelidin-carbonsiiure2). Im Busammenhang mit laufenden Untersuchungen wurde auch ein Verfahren zur Herstellung der 3-Chinuclidin-carbonsiiure (Is) entwickelt. Ausser der Synthese di
## Abstract The synthesis of 4‐bromo and 4‐hydroxy‐quinuclidines Ia and Ib, respectively, from 4‐piperidones by a modified REFORMATZKI reaction is described.
## Abstract Reaction rate and hydrolysis products of 2‐(α‐chlorobenzyl)‐quinuclidine (13b) provide no evidence for the participation of the quinuclidine nitrogen in the ionisation step of this unusual β‐haloamine. Furthermore, no product derived from a «hetero‐cinchonine rearrangement» was isolated
## Abstract An improved synthesis of 4‐carbethoxyquinuclidine from 1‐benzyl‐4‐piperidone is described.
## Abstract 1‐Methyl‐4‐cyano‐piperidine (XIII), an intermediate in the synthesis of 4‐substituted quinuclidines, has been prepared and its alkylation at the 4‐position studied.