3-Aryl and 5-aryl-4-methoxy-6-methyl-2H-pyran-2-ones by Suzuki cross-coupling reactions of 3- and 5-halogeno-4-methoxy-6-methyl-2H-pyran-2-ones
摘要:
3-Arylpyrones and 5-arylpyrones featuring the 4-methoxy-2H-pyran-2-one moiety are obtained by Suzuki cross-coupling of the corresponding 3-iodo and 5-bromo derivatives with arylboronic acids. (C) 1998 Elsevier Science Ltd. All rights reserved.
3-Aryl and 5-aryl-4-methoxy-6-methyl-2H-pyran-2-ones by Suzuki cross-coupling reactions of 3- and 5-halogeno-4-methoxy-6-methyl-2H-pyran-2-ones
摘要:
3-Arylpyrones and 5-arylpyrones featuring the 4-methoxy-2H-pyran-2-one moiety are obtained by Suzuki cross-coupling of the corresponding 3-iodo and 5-bromo derivatives with arylboronic acids. (C) 1998 Elsevier Science Ltd. All rights reserved.
Et<sub>3</sub>N-Induced Demethylation−Annulation of 3-Alkynyl-4-methoxy-2-pyridones and Structurally Related Compounds in the Synthesis of Furan-Fused Heterocycles
Various 3-iodo-4-methoxypyridin-2-ones and related pyrone and coumarin derivatives have been demonstrated as readily available precursors of 2-substituted furan-fused heterocycles by means of in situ sequential Sonogashira-acetylide coupling. dealkylation, and regioselective furan annulation reactions. A Et3N-induced S(N)2 process has been established that accounts for the dealkylation process.