Furan as a 1,3-diketone equivalent: the second type furan recyclization applied to indole synthesis
摘要:
A new approach for the synthesis of indole derivatives based on protolytic recyclization of 2-alkyl-5-(2-tosylaminoaryl)-furans is described. The furan ring in this unusual transformation formally serves as a 1,3-diketone equivalent. (c) 2006 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed Decarboxylative C-H Bond Arylation of Furans
作者:Kai Pei、Xiaoming Jie、Huaiqing Zhao、Weiping Su
DOI:10.1002/ejoc.201402278
日期:2014.7
A Pd/PCy3/Ag2CO3 (Cy = cyclohexyl) catalytic system was found to promote decarboxylativearylation through the combination of decarboxylation and C–H bond functionalization. This protocol features a good substrate scope of aromatic carboxylic acids as well as a broad range of functional groups and provides the products in high yields.
Furan ring opening–indole ring closure: recyclization of 2-(2-aminophenyl)furans into 2-(2-oxoalkyl)indoles
作者:Arkady S. Pilipenko、Vladimir V. Mel’chin、Igor V. Trushkov、Dmitry A. Cheshkov、Alexander V. Butin
DOI:10.1016/j.tet.2011.10.114
日期:2012.1
The acid-catalyzedrearrangement of 5-alkyl-2-[2-(sulfonylamino)phenyl]furans into 2-(2-oxoalkyl)indoles is described. When the N-sulfonyl group in the starting compounds was displaced by an N-acyl group, the corresponding indoles were not formed under the same reaction conditions due to the in situ indole deacylation and decomposition. The presence of an alkyl group at the C5 position of the furan
Oxidative Transformation of 2-Furylanilines into Indolin-3-ones
作者:Ekaterina R. Nasibullina、Elena Y. Mendogralo、Anton A. Merkushev、Anton S. Makarov、Maxim G. Uchuskin
DOI:10.1021/acs.joc.4c00359
日期:2024.5.3
Oxidation of 2-furylaninlies with m-CPBA followed by treatment with a base provides access to functionalized indolin-3-ones. The designed oxidativetransformation utilizes an underassessed chemical behavior of furyl-containing amines to form a C–N bond via engaging a β-carbon atom of the furan core upon a ring-forming step, thereby providing an alternative disconnection toward nitrogen-containing heterocycles