Synthesis of Benzofurans<i>via</i>Tandem Rhodium-Catalyzed C(<i>sp</i><sup>3</sup>)H Insertion and Copper-Catalyzed Dehydrogenation
作者:Lin Li、Xiao-Han Xia、Yong Wang、Pranjal P. Bora、Qiang Kang
DOI:10.1002/adsc.201500396
日期:2015.6.15
approach for the synthesis of benzofuran derivatives (up to 88% yield) from 1‐sulfonyl‐1,2,3‐triazoles has been developed. The cascade reaction involves sequential rhodium‐catalyzed C(sp3)Hinsertion and copper‐catalyzed aerobic oxidation. The method was made more convenient towards the synthesis of benzofurans starting fromterminalalkynes via a one‐pot sequential copper‐catalyzed alkyne‐azide cycloaddition
Intramolecular sp3 C-Hinsertion of [small alpha]-imino carbenoid. One pot synthesis of benzofuran derivatives.
[小α]-亚氨基类胡萝卜素的分子内sp3 CH插入。一锅合成苯并呋喃衍生物。
Highly Selective Insertion of Arynes into a C(sp)−O(sp<sup>3</sup>) σ Bond
作者:Krzysztof Z. Ła̧czkowski、Diego García、Diego Peña、Agustín Cobas、Dolores Pérez、Enrique Guitián
DOI:10.1021/ol103001k
日期:2011.3.4
Arynes react with ethoxyacetylene to afford 2-ethoxyethynylaryl derivatives through a highly chemo- and regioselective formal insertion of the aryne into the C(sp)-O(sp(3)) bond of the alkyne. Computational studies suggest that the reaction does not proceed through a mechanism initiated by the nucleophilic addition of the oxygen atom to the aryne as previously proposed but by the addition of the triple bond of the alkyne to the aryne.
A convenient reagent for aldehyde to alkyne homologation
作者:Douglass F. Taber、Sha Bai、Peng-fei Guo
DOI:10.1016/j.tetlet.2008.09.114
日期:2008.11
A convenient reagent for the one-carbon homologation of an aldehyde to the corresponding alkyne is reported. This reagent allows this conversion to conveniently be carried out on a large scale under ambient conditions. (c) 2008 Elsevier Ltd. All rights reserved.
SUBSTITUTED AMINOALKYLAMIDE DERIVATIVES AS ANTAGONISTS OF FOLLICLE STIMULATING HORMONE