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'Coumarins' in keywords Facet   section ZfN Section B  [X]
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1995 (1)
1982 (1)
1Author    VirinderS. Parmar, HirdayN. Jha, SudershanK. Sanduja, Radhika SandujaRequires 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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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0521.pdf 
 Identifier    ZNB-1982-37b-0521 
 Volume    37 
2Author    Fiirstner, DenisN. Jumbam, Nongyuan ShiRequires 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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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0326.pdf 
 Identifier    ZNB-1995-50b-0326 
 Volume    50