New coumarin derivatives, processes for the preparation thereof and their use
申请人:PLIVA farmaceutska, kemijska, prehrambena i kozmeticka industrija, dionicko drustvo
公开号:EP0816353B1
公开(公告)日:2001-12-19
US5840922A
申请人:——
公开号:US5840922A
公开(公告)日:1998-11-24
Synthesis and study of substituted coumarins. A facile preparation of D,L-<i>o</i>-tyrosine
作者:George Kokotos、Chrysa Tzougraki
DOI:10.1002/jhet.5570230118
日期:1986.1
3-aminocoumarin (XII). Acidhydrolysis of XIII under the above mentioned conditions, (a) and (b), gave XII and 3-hydroxycoumarin (XVI), respectively. Hydrogenation of compound XIII in dioxane or in dimethylformamide with 10% palladium on charcoal gave 3-salicylaminocoumarin (XVII), while hydrogenation of XII, XIII or XVII in acetic acid with traces of water and palladium black gave the amino acid o-tyrosine.
Syntheses of some new coumarin-quinolone carboxylic acids
作者:Mladen Trkovnik、Zrinka Ivezić
DOI:10.1002/jhet.5570370123
日期:2000.1
ethoxymethylenemalonate to give intermediates 11-18. Thermal cyclizations of intermediates give benzopyranopyridinecarboxylates 19-26. These esters were hydrolyzed to the corresponding benzopyranopyridine carboxylic acids 27-34.