Synthese von Alkylphenolen und??pyrocatecholen aus Plectranthus albidus (Labiatae)
C Bürgi, G Liu, P Rüedi
Index: Buergi, Christoph; Liu, Gui; Rueedi, Peter Helvetica Chimica Acta, 1993 , vol. 76, p. 1901 - 1915
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Citation Number: 15
Abstract
Reaktionssequenz sind die 5-Arylpentanale 17c and 18c, welche aus 5-Bromopentansaure mit dem 'elektrophilen'Hydrid-Donor AlH,[1 I] via 5-Bromopentanol zuganglich wurden (s. Exper. Teil). Schliisselschritt ist dabei die Cu'-katalysierte Grignard-Reaktion des Tetrahydr0- 2H-pyranyl (Thp)-ethers 14 rnit den Aryl-halogeniden 15 bzw. 16 zu den geschutzten 5- Arylpentanol-Derivaten 17a und 18a4). Entfernung der Schutzgruppe [I41-+(17b, 18b) ...
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