- Quinone approaches toward the synthesis of aflatoxin B2
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equation presented Quinones bearing electron-withdrawing groups can serve as useful precursors to furobenzofuran ring systems through their reaction with 2,3-dihydrofuran. Formal racemic and stereoselective syntheses of the fungal metabolite aflatoxin Bs
- Noland, Wayland E.,Kedrowski, Brant L.
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p. 2109 - 2111
(2007/10/03)
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- THE GENERATION OF C,O,O-TRILITHIATED DERIVATIVES OF DIHYDRIC PHENOLS
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Halogenated dihydric phenols (hydroquinones and resorcinols) undergo halogen metal exchange with nBuLi/TMEDA/THF or ether (inverse addition) under sonication, thereby generating a C,O,O-trilithiated species which can be trapped with electrophiles.
- Saa, Jose M.,Morey, Jeroni,Suner, Guillem,Frontera, Antoni,Costa, Antoni
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p. 7313 - 7316
(2007/10/02)
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- Studies on Quinones. VII(1). Synthesis of Some Benzothiophene-4,7-diones
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The synthesis of methyl 4,7-dihydro-4,7-dioxobenzothiophene-2-carboxylate (20) based on the reaction of methyl mercaptoacetate with activated 1,4-benzoquinones is described.Methyl 4,7-dihydro-4,7-dioxo-5-hydroxybenzothiophene-2-carboxylate (24) and its corresponding methyl ether 26 were obtained through a Thiele-Winter acetoxylation on 20.On the basis of the properties of methyl 4,7-dihydro-4,7-dioxo-6-methoxybenzothiophene-2-carboxylate (21) obtained from 2,4,5-trimethoxybenzaldehyde (32), the structures of the products 24 and 26 are proposed.
- Ruiz, V. M.,Tapia, R.,Valderrama, J.,Vega, J. C.
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p. 1161 - 1164
(2007/10/02)
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