| | 1 | Author
| Viqar Uddin, Ahmad, ZulfiqarA. Li3, Muhammad Shaiq, A. Li3, Fazila Iqbal3, Muhammad Zahid3, RasoolBakhsh Tareenb, H.E J | Requires cookie* | | | Title
| Two New Aromatic Constituents from Stocksia brahuica  | | | | Abstract
| The methanolic extract of Stocksia brahuica yielded two new aromatic constituents: diphe nylacetic acid and brahene (2',4'-dihydroxy-7-methoxy-4,5-methylenedioxyisoflavene). Their structures were characterized with the help of modern spectroscopic techniques including 2D-NMR. | | | |
Reference
| Z. Naturforsch. 54b, 940—942 (1999); received January 2 1999 | | | |
Published
| 1999 | | | |
Keywords
| Diphenylacetic Acid, Brahene, Sapindaceae, Stocksia brahuica, Structure Elucidation | | | |
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| default:Reihe_B/54/ZNB-1999-54b-0940.pdf | | | | Identifier
| ZNB-1999-54b-0940 | | | | Volume
| 54 | |
| 2 | Author
| Joachim Heinickea, Attila Dala, Hans-Friedrich Kleinb, Olaf Hetcheb, Ulrich Flörkec, Hans-Jürgen Hauptc | Requires cookie* | | | Title
| Formation of r71-P-(2-Phosphinophenol)Ni(0)(PMe3)3 and Oxidation to cjs/fraws-Bis(2-phosphinophenolato)nickel(II) Complexes | | | | Abstract
| o-Phosphinophenols 1 (P ^ O H) react with equimolar amounts of Ni(PMe3)4 at low tempera tures to give yellow Ni(0) complexes such as [(HO~P)Ni(PMe3)3] 2a with only P coordination of the P ^ O H ligand. Oxidation of solutions of 1 and Ni(PMe3)4 by dioxygen leads to brown bis(o-phosphinophenolato-P^O)nickel chelate complexes 3a-d. Structure elucidation by NM R is consistent with a m-square planar geometry for 3a-c and a rrans-square planar solution struc ture of the terr-butylphenylphosphino derivative 3d. The geometric isomers were distinguished by different ranges of phosphorus coordination shifts and 3lP-l3C-2 and 3IP-13C-1 coupling | | | |
Reference
| Z. Naturforsch. 54b, 1235—1243 (1999); received May 19 1999 | | | |
Published
| 1999 | | | |
Keywords
| Phosphinophenolate, Nickel, Complexes, Structure Elucidation, Solid State Structures | | | |
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| 54 | |
| 4 | Author
| M. Uhammad, Shaiq Ali, Muhammad Saleem, Viqar Uddin, H.E J | Requires cookie* | | | Title
| Zatatriol: A New Aromatic Constituent from Zataria multiflora Ahm ad | | | | Abstract
| A new isopropyl benzene derivative named as zatatriol (5) and two synthetically known compounds (2 and 7) having the same skeleton have been isolated from the hexane soluble part of a Lamiaceous plant Zataria multiflora. In addition to 2, 5 and 7, som e known constitu ents: p-cym ene (1), thymol (3), thymol methyl-ether (4) , /3-sitosterol, stigmasterol, oleanolic acid, betulinic acid, and hexadecanoic acid have also been isolated from the same source. Structures of the isolated constituents were elucidated with the aid of NM R spectroscopy. | | | |
Reference
| Z. Naturforsch. 54b, 807 (1999); received July 22 1998 | | | |
Published
| 1999 | | | |
Keywords
| Lamiaceae, Zataria multiflora, Isopropyl Benzene Constituents, Structure Elucidation, N M R Data | | | |
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| 54 | |
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