- Microwave-assisted efficient synthesis of alliodorin and (±)- curcuhydroquinone
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Terpenoids 1 and 2 have been synthesized from readily available starting materials using Li2CuCl4-catalysed coupling of Grignard reagents with alkyl/aryl bromides and microwave-assisted oxidation of allylic methyl groups, using SeOs
- Kad, Goverdhan L.,Khurana, Anupam,Singh, Vasundhara,Singh, Jasvinder
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p. 164 - 165
(2007/10/03)
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- PRENYLATION OF OLEFINS IN NITROMETHANE
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The prenylation of isopentenyl and 3,3-dimethylallyl derivatives could be achieved efficiently with dimethyl vinyl carbinol and a variety of acids in nitromethane.Geraniol and isopentenylacetate led to farnesyl derivatives.
- Julia, M.,Schmitz, C.
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p. 2485 - 2490
(2007/10/02)
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- AN EFFICIENT REGIO- AND STEREOSPECIFIC ALKENYLATION OF PHENOLIC ETHERS BY PRENYL AND GERANYL DIISOPROPYL PHOSPHATES
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Prenyl and geranyl diisopropyl phosphates readily alkenylate a variety of phenolic ethers regio- and stereospecifically without any appreciable side reactions.
- Araki, Shuki,Manabe, Shin-ichi,Butsugan, Yasuo
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p. 797 - 800
(2007/10/02)
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- Acid-catalysed Intramolecular Cyclization of Geranyl Hydroquinone Derivatives from Cordia alliodora. X-Ray Crystal and Molecular Structure of 1,2,3,3a,4,9,10,10a-Octahydro-5,8-dimethoxy-3,10-dimethyl-3a,9-epoxybenzazulene
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The aqueous acid-catalysed intramolecular cyclization of dimethylated alliodorin (2) obtained from the heartwood of Cordia alliodora has been characterized by X-ray analysis as the unusual tetracyclic di-O-methyl hydroquinone title compound (8).A new synthesis of di-O-methylalliodorin (2) from a terminal methylallylic sulphide derivative of 2-geranil-1,4-dimethoxybenzene is described. Crystals of the title compound (8) are monoclinic, space group P21/c, unit cell dimensions a = 14.984(7), b = 5.206(4), c = 20.131(9) Angstroem, β = 99.77(1) deg, Z = 4.The structure was solved by direct methods and refined by least-squares calculations to an R value of 0.078 for 1 832 independent reflections measured on a diffractometer using Cu-Kα radiation.
- Manners, Gary D.,Wong, Rosalind Y.
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p. 1849 - 1854
(2007/10/02)
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