Study on the adsorption of 1,5-, 1,6- and 2,6-dimethylnaphthalene on a series of alkaline and alkaline earth ion-exchanged faujasite zeolites
✍ Scribed by Natthakorn Kraikul; Pramoch Rangsunvigit; Santi Kulprathipanja
- Publisher
- Springer
- Year
- 2006
- Tongue
- English
- Weight
- 603 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0929-5607
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The title compounds (2 and 4) obtained by the diastereoselective hydrogenation of the corresponding 1,2,3,6-tetrahydrophosphinine oxides (1 and 3) were subjected to a detailed quantum chemical study. The possible chair conformers were calculated at the HF/6-31G \* level of theory, according to which
## Abstract GLC. allowed the isolation of 1, 3, 6, 6‐tetramethyl‐5, 6, 7, 8‐tetrahydro‐isoquinolin‐8‐one (__A__) and 3,6,6‐trimethyl‐5,6‐dihydro‐__7H__‐2‐pyrindin‐7‐one (__D__) from __Burley__ tobacco condensate (about 0.1% each). The structures and syntheses of these novel terpenoid alkaloids are