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Preparation of 3-(Trifluoromethyl)coumarins

✍ Scribed by Wojciech Dmowski; Krystyna Piasecka-Maciejewska

Publisher
John Wiley and Sons
Year
2010
Weight
28 KB
Volume
33
Category
Article
ISSN
0931-7597

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13C NMR of coumarins. V—3-prenylated cou
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## Abstract ^13^C NMR data of nineteen coumarins, twelve of which bear a prenyl (isoprenoid) side‐chain at C‐3, are reported and compared with those of the C‐3 unsubstituted compounds. Unlike the linear isomers, no γ‐effect is observed in the corresponding angular derivatives; this is proposed as s

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Previously difficult to prepare, aliphatic and alicyclic trifluoromethylketones (e.g. 1 and 2), which are of pharmacalogic interest as potential enzyme inhibitors, can now be synthesized easily and efficiently. The one-step reaction starting with carbonic esters and trimethyl(trifluoromethyl)silane

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