𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Proton magnetic resonance studies of compounds with bridgehead nitrogen atoms—XXIII: Deformation of the piperidine ring in some bicyclic compounds possessing a bridgehead amide nitrogen atom

✍ Scribed by R. Cahill; T. A. Crabb


Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
377 KB
Volume
5
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

Some bridgehead nitrogen compounds possessing the CH(Me)‐bridgehead NC(O) system have been synthesised and their configurations assigned. The chemical shifts of the proton geminal to the methyl group provides evidence for the existence of a deformed chair conformation for the methyl substituted ring.


📜 SIMILAR VOLUMES


Proton magnetic resonance studies of com
✍ T. A. Crabb; P. J. Chivers; R. F. Newton 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 297 KB

## Abstract Octahydroimidazo[1,5‐__a__]pyridine is shown to preferentially adopt the __trans__‐fused ring conformation in solution at room temperature. The NMR spectra of the rotational isomers of some __N__‐acetyloctahydroimidazo[1,5‐__a__]pyridines and __N__‐acetyloctahydro‐1H‐pyrido[1,2‐__c__]py

Proton magnetic resonance studies of com
✍ Trevor A. Crabb; Philip A. Jupp 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 375 KB

## Abstract Solvent effects on the ^1^H NMR parameters of perhydro‐oxazolo[3,4‒__a__]pyridine, perhydropyrido[1,2‒__c__]‒[1,3]oxazine and perhydrothiazolo[3,4‒__a__]pyridine derivatives are described. Particularly marked are changes in the proton‐proton geminal coupling constants of the NCH~2~O and

Proton magnetic resonance studies of com
✍ Trevor A. Crabb; Philip A. Jupp 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 478 KB

## Abstract __cis__(1‐H, 8a‐H)‐1‐Methylperhydro‐oxazolo[3,4‐__a__]pyridine and __cis__(1‐H, 8a‐H)‐1‐methylperhydrothiazolo[3,4‐__a__]pyridine both adopt exclusively the __trans__‐fused conformation in carbon tetrachloride solution at room temperature. Both parent unsubstituted systems exist under s

Proton magnetic resonance studies of com
✍ Trevor A. Crabb; Jacqueline S. Mitchell 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 284 KB

## Abstract __cis__(4‐H,11b‐H)‐4‐Aryl‐1,6,7,11b‐tetrahydro‐2__H__,4__H__‐[1,3]oxazino [4,3‐__a__]isoquinoline and the related thiazino compound preferentially adopt in solution the O (or S) inside __cis__‐conformation in contrast to __cis__(1‐H,4a‐H)‐1‐arylperhydropyrido[1,2‐__c__][1,3]oxazine whic