| | 1 | Author
| VirinderS. Parmar, HirdayN. Jha, SudershanK. Sanduja, Radhika Sanduja | Requires cookie* | | | Title
| Trigocoumarin -a New Coumarin from Trigonella foenumgraecum  | | | | Abstract
| A new coumarin, named trigocoumarin has been isolated from Trigonella foenumgraecum along with some known compounds. Based upon its spectral (IR, UV, NMR and MS) and analytical data, trigocoumarin has been assigned the structure: 3-(ethoxycarbonyl)-methy 1 -4 -methyl -5,8-dimethoxy coumarin. | | | |
Reference
| Z. Naturforsch. 37b, 521—523 (1982); received October 8 1981 | | | |
Published
| 1982 | | | |
Keywords
| Trigonella foenumgraecum, Leguminoseae, Coumarin | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0521.pdf | | | | Identifier
| ZNB-1982-37b-0521 | | | | Volume
| 37 | |
| 2 | Author
| Fiirstner, DenisN. Jumbam, Nongyuan Shi | Requires cookie* | | | Title
| Alois | | | | Abstract
| Low-valent titanium prepared by the reduction of TiCl3 with zinc dust oxidatively adds to a-ketoam ides or a-ketoesters with the formation of the corresponding titanium enediolates. These 1,2-difunctional nucleophiles, which have hardly been used in organic synthesis so far, undergo regioselective intramolecular aldol condensation reactions with various electrophiles such as aldehydes, ketones, nitriles, esters and amides. This methodology allows the synthesis of differently substituted coumarin and 2-quinolone derivatives. | | | |
Reference
| Z. Naturforsch. 50b, 326—332 (1995); received September 13 1994 | | | |
Published
| 1995 | | | |
Keywords
| Low-Valent Titanium, Enediolates, Coumarins, 2-Quinolones, Aldol Condensation | | | |
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| default:Reihe_B/50/ZNB-1995-50b-0326.pdf | | | | Identifier
| ZNB-1995-50b-0326 | | | | Volume
| 50 | |
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