- Copper(ii)-catalyzed C-O coupling of aryl bromides with aliphatic diols: Synthesis of ethers, phenols, and benzo-fused cyclic ethers
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A highly efficient copper-catalyzed C-O cross-coupling reaction between aryl bromides and aliphatic diols has been developed employing a cheaper, more efficient, and easily removable copper(ii) catalyst. A broad range of aryl bromides were coupled with aliphatic diols of different lengths using 5 mol% CuCl2 and 3 equivalents of K2CO3 in the absence of any other ligands or solvents to afford the corresponding hydroxyalkyl aryl ethers in good to excellent yields. In this newly developed protocol, aliphatic diols have multilateral functions as coupling reactants, ligands, and solvents. The resulting hydroxyalkyl aryl ethers were further readily converted into the corresponding phenols, presenting a valuable alternative way to phenols from aryl bromides. Furthermore, it was demonstrated that they are useful intermediates for more advanced molecules such as benzofurans and benzo-fused cyclic ethers. This journal is
- Liu, Yajun,Park, Se Kyung,Xiao, Yan,Chae, Junghyun
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supporting information
p. 4747 - 4753
(2014/06/24)
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- Discovery and SAR of potent, orally available and brain-penetrable 5,6-dihydro-4H-3-thia-1-aza-benzo[e]azulen- and 4,5-dihydro-6-oxa-3-thia-1-aza- benzo[e]azulen derivatives as neuropeptide Y Y5 receptor antagonists
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Combination of structural elements from a potent Y5 antagonist (2) with thiazole fragments that exhibit weak Y5 affinities followed by lead optimisation led to the discovery of (5,6-dihydro-4H-3-thia-1-aza-benzo[e]azulen-2-yl)- piperidin-4-ylmethyl-amino and (4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-2- yl)-piperidin-4-ylmethyl-amino derivatives. Both classes of compounds are capable of delivering potent and selective orally and centrally bioavailable NPY Y5 receptor antagonists.
- Rueeger, Heinrich,Gerspacher, Marc,Buehlmayer, Peter,Rigollier, Pascal,Yamaguchi, Yasuchika,Schmidlin, Tibur,Whitebread, Steven,Nuesslein-Hildesheim, Barbara,Nick, Hanspeter,Cricione, Leoluca
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p. 2451 - 2457
(2007/10/03)
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- Synthesis and Biological Activities of 8,9-Disubstituted 4,5-Dihydro-2H--benzoxepinopyrazoles and Related Compounds
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Condensation of 2,3,4,5-tetrahydro-1-benzoxepin-5-ones (2a-d) with different benzaldehydes affords the benzylidine derivatives (3a-d) which on epoxidation followed by treatment with hydrazine hydrate and arylhydrazines furnish the title benzoxepinopyrazol
- Tripathi, Ravish C.,Tandon, V. K.,Khanna, J. M.,Saxena, Anil K.,Anand, Nitya
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