1,9,8-cyclization of 1,8-disubstituted anthraquinones. 12H-benzo[m,n]chromeno [2,3,4-k,l]kacridine derivatives
โ Scribed by S. V. Reznichenko; V. P. Shapkin; S. I. Popov
- Book ID
- 112369481
- Publisher
- Springer US
- Year
- 1980
- Tongue
- English
- Weight
- 415 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0009-3122
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## Abstract The preferred conformations of the four isomers of 1,2,3,4,4a,6,7,8,9,13bโdecahydroโ9a__H__โpyrido[1,2โ__f__] phenanthridine have been determined by 270 MHz ^1^H n.m.r. and i.r. spectroscopy. N.m.r. assignments are based on the specific chemical shifts of the protons adjacent to the nit
## Abstract The influence of the configuration and the conformation on the ^13^C n.m.r. spectrum of 1,2,3,4,4a,6,7,8,9,13bโdecahydroโ9a__H__โpyrido[1,2โ__f__] phenanthridine was investigated. These observations, coupled with the low temperature spectrum allowed us to confirm the __trans__โ__syn__โ_