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- W4246009941 abstract "Many natural terpenic compounds are known to have skeltons of 1-4 addition of isoprene. But few terpenic compounds have been synthesized hitherto. We shall now report the synthesis of citronellol VII-a natural monoterpene alcohol-from isoprene. The reaction consists of the f olloouing four steps ; (1) Catalytic dimerization and alcohol addition of isoprene in the presence of (π-allyl PdCI) 2, phos-phine, and NaOMe. The yield of II is up to 97.5% when PPh3 : (π-allyl PdCI) 2=2 : 1 and 2 days reaction at room temperature. (2) Dealcohol reaction of If or V is carried out in the presence of [P (η-Bu) 3] 2 NiCl2 and NaOMe as catalytic system, (3) Selective 1-4 hydrogenation of conjugated diene is carried out in the presence of Cr (CO) 3 (C6H, -COOMe) as a catalyst under hydrogen atmosphere to form IV or VI. (4) Terminal hydration of terminal double bond is carried out by hydroboration and following alkaline hydrolysis to obtain V or VII.Two synthetic routes are practically possible and the overall yield of citronellol is ca. 40% in each case." @default.
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- W4246009941 date "1976-01-01" @default.
- W4246009941 modified "2023-10-15" @default.
- W4246009941 title "Synthesis of Citronellol from Isoprene" @default.
- W4246009941 doi "https://doi.org/10.5650/jos1956.25.549" @default.
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