| Autor: |
Josef Cvačka, Bernd R.T. Simoneit, L'udmila Turčániová, Anton Zubrik, David Šaman, Soňa Vašíčková, Michal Lovás |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Organic Geochemistry. 40:126-134 |
| ISSN: |
0146-6380 |
| DOI: |
10.1016/j.orggeochem.2008.08.011 |
| Popis: |
Aliphatic diterpenes were isolated from brown coal from Handlova, Slovakia, using microwave assisted extraction of mechanically activated coal powder. The parameters of the extraction procedure were optimized to get the target compounds in high yield. The total extract was separated using adsorption chromatography. GC–MS revealed tetracyclic and tricyclic diterpanes in the aliphatic fraction; they were identified as 16α( H )-phyllocladane (83%), isopimarane (11%), 18-norisopimarane (4%), abietane (2%) and fichtelite ( H )-phyllocladane could be extracted from 1 kg of Handlova coal. Because of the scarcity of relevant analytical data, 16α( H )-phyllocladane was thoroughly characterized by spectroscopic and chromatographic methods. A complete set of 1 H and 13 C NMR data is given including their comparison with published values and ab initio calculations. EI mass and IR spectra of 16α( H )-phyllocladane are shown and discussed. Kovats retention indices measured on two common GC stationary phases are also given. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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