An expedient route to substituted furans via olefin cross-metathesis
作者:Timothy J. Donohoe、John F. Bower
DOI:10.1073/pnas.0913466107
日期:2010.2.23
of highly substituted derivatives are essential to medicinal chemistry. Here we show that the olefin CM reaction, in combination with an acid cocatalyst or subsequent Heck arylation, provides a concise and flexible entry to 2,5-di- or 2,3,5-tri-substituted furans. These cascade processes portend further opportunities for the regiocontrolled preparation of other highly substituted aromatic and heteroaromatic
烯烃交叉复分解 (CM) 反应广泛用于有机化学,是选择性合成差异取代烯烃产物的有效方法。令人惊讶的是,尚未报道将这一非凡的过程整合到芳香族和杂芳香族构建策略中的努力。这种结构代表了大多数小分子药物化合物的关键要素;高度取代衍生物的受控制备方法对于药物化学是必不可少的。在这里,我们展示了烯烃 CM 反应与酸助催化剂或随后的 Heck 芳基化相结合,为 2,5-二-或 2,3,5-三-取代呋喃提供了简洁而灵活的入口。
A novel cyclization reaction between 2,3-bis(trimethylsilyl)buta-1,3-diene and acyl chlorides with straightforward formation of polysubstituted furans
作者:Francesco Babudri、Stefania R. Cicco、Gianluca M. Farinola、Linda C. Lopez、Francesco Naso、Vita Pinto
DOI:10.1039/b705257j
日期:——
A novel cyclization process of 2,3-bis(trimethylsilyl)buta-1,3-diene with various acyl chlorides in the presence of aluminium trichloride affords 2,5-disubstituted or 2,3,5-trisubstituted furans in short reaction time; a subsequent acylation process of the furan ring occurs if the reaction time is prolonged.
?,?-unsaturated ketones in substitutive addition with 2-alkylfurans and some transformations of the reaction products
作者:Sh. T. Akhmedov、N. S. Sadykhov、R. Sh. Akhmedova、N. S. Zefirov
DOI:10.1007/bf00506982
日期:1981.12
Ruthenium-catalysed conversion of 1,4-alkynediols into pyrroles
作者:Simon J. Pridmore、Paul A. Slatford、Aurélie Daniel、Michael K. Whittlesey、Jonathan M.J. Williams
DOI:10.1016/j.tetlet.2007.05.070
日期:2007.7
Various 1,2,5-substituted pyrroles have been synthesised from 1,4-alkynediols using a ruthenium catalysed isomerisation to give the corresponding 1,4-dicarbonyl compounds, which undergo in situ cyclisation to pyrroles in the presence of amine. (C) 2007 Published by Elsevier Ltd.
FLEMING, IAN;MORGAN, IAN T.;SARKAR, ACHINTYA K., J. CHEM. SOC. CHEM. COMMUN.,(1990) N2, C. 1575-1577
作者:FLEMING, IAN、MORGAN, IAN T.、SARKAR, ACHINTYA K.