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Benzo- and indoloquinolizines. XII—carbon-13 n.m.r. study of the conformation of the 1,2,3,4,4a,6,7,8,9,13b-decahydro-9a H-pyrido[1,2-f]phenanthridine isomers

✍ Scribed by G. Van Binst; G. Laus; D. Tourwé

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
270 KB
Volume
10
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The influence of the configuration and the conformation on the ^13^C n.m.r. spectrum of 1,2,3,4,4a,6,7,8,9,13b‐decahydro‐9a__H__‐pyrido[1,2‐f] phenanthridine was investigated. These observations, coupled with the low temperature spectrum allowed us to confirm the trans‐syn‐cis as the preferred conformation for one of the four isomers. At −40°C, 2–3% of another conformer could be detected and identified as the cis‐anti‐cis‐2.

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