- A simple and efficient approach for the preparation of dihydroxanthyletin, xanthyletin, decursinol and marmesin
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A simple and efficient approach has been developed for the preparation of coumarin natural products such as dihydroxanthyletin, xanthyletin, decursinol and marmesin starting from commercially available 2,4-dihydroxybenzaldehyde with very good yields. Wittig homologation and Claisen rearrangement are the protocols used to achieve these molecules.
- Kommera, Rajkumar,Bhimapaka, China Raju
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p. 3204 - 3211
(2020/08/05)
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- Gold nanoparticles supported on TiO2 catalyse the cycloisomerisation/oxidative dimerisation of aryl propargyl ethers
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Gold nanoparticles supported on TiO2 (～1%) catalyse in high yields the selective cycloisomerisation of aryl propargyl ethers into the corresponding 2H-chromenes, under heterogeneous conditions. 2H,2′H-3, 3′-Bichromenes resulting from a catalytic oxidative dimerization pathway are also formed as by-products. The Royal Society of Chemistry 2011.
- Efe, Christina,Lykakis, Ioannis N.,Stratakis, Manolis
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supporting information; body text
p. 803 - 805
(2011/04/12)
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- Anti-AIDS agents 83. Efficient microwave-assisted one-pot preparation of angular 2,2-dimethyl-2H-chromone containing compounds
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A novel and efficient microwave-assisted one-pot reaction was developed to synthesize angular 2,2-dimethyl-2H-chromone-containing compounds, which is the first and key step in the synthesis of potent DCK and DCP anti-HIV agents. The newly developed microwave synthesis conditions dramatically shortened the reaction time from 2 days to 4 h with improved yields.
- Zhou, Ting,Shi, Qian,Lee, Kuo Hsing
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experimental part
p. 4382 - 4386
(2010/09/12)
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- Cesium fluoride-mediated claisen rearrangements of phenyl propargyl ethers: Substituent effects of an orthoalkoxy group on the benzene ring or modified propargyl residues
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The expected 7-alkoxy-2-methylbenzo[b]furans were effectively given in the CsF-mediated Claisen rearrangement of phenyl propargyl ethers with an o-alkoxy substituent on the benzene ring. On the other hand CsF did not affect the production of the corresponding benzo[b]furans when ethers, carrying a propargyl residue modified by either 1,1-dimethyl or 3-ethoxycarbonyl functions, were used as substrates in the rearrangement.
- Ishikawa, Tsutomu,Mizutani, Akiko,Miwa, Chizue,Oku, Yumie,Komano, Naoko,Takami, Atsuya,Watanabe, Toshiko
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p. 2261 - 2272
(2007/10/03)
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- Studies on Rutaceae: Part II - Chemical Investigations of the Constituents of Atlantia Wightii, Limon creniaulata, Feronia limonia, Citrus limon and Synthesis of Luvangetin, Xanthyletin and Marmin
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Four different species of Rutaceae belonging to the genera Atalantia, Limonia, Feronia and Citrus have been subjected to thorough chemical investigation.Convenient and simple syntheses of luvangetin (II), a major constituent of Limonia crenulata, xanthyletin (I), obtained from Citrus limon and marmin (IX), a lactonic constituent of Feronia limonia, have been described.
- Banerji, J.,Ghoshal, N.,Sarkar, S.,Kumar, M.
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p. 496 - 498
(2007/10/02)
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