## Abstract The syntheses of isotopically labelled (โ)โ10โ[^11^C/^13^C]โcolchicine and (โ)โ9โ[^11^C/^13^C]โ isocolchicine have been achieved from the reaction of (โ)desmethylcolchicine with [^11^C/^13^C]โiodomethane. The radiolabelled compounds, (โ)โ10โ[^11^C]โcolchicine (^11^Cโnโcolchicine) and (โ
Syntheses of piperidine and granatanine doubly isotopically substituted with carbon-13
โ Scribed by Jennifer J. C. Barna; Michael J. T. Robinson
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- French
- Weight
- 353 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
Syntheses of (2,3โ^13^C~2~) piperidine and (1,2โ^13^C~2~) granatanine via (1,2โ^13^C2)โglutaric acid have been achieved using a benzene ring as a potential carboxyl group.
๐ SIMILAR VOLUMES
## Abstract A series of 5ฮฒโcholanic acids labeled with deuterium in the A ring were prepared by exchange labeling of the corresponding ketone by column chromatography on deuterated alumina. Factors affecting yield and labeling efficiency are discussed. 5ฮฒโCholanic acids labeled with ^13^C in the ca
## Abstract Doublets can be observed for carbons ฮฑ and ฮฒ to the hydroxyl in aliphatic alcohols containing equimolar amounts of OH and OD dissolved in (CH~3~)~2~SO containing CaSO~4~ desiccant. Isotopic doublets are also observed for the __ipso__ and __ortho__ carbons in alkyl substituted phenols. _
## Abstract ^13^C chemical shift assignment of several methyl substituted heterocyclic naphthoโ and anthraquinones, including dihydronaphthofuranquinones, azaanthraquinones, benzopyrroloquinolinediones and benzothiophenoquinolinediones, are described. A deshielding effect due to a methyl group was