A transitionmetal-free domino process has been developed, for the first time, to synthesize (E)-stilbenes, biaryl methanes and biaryl ethers from substituted α,β-unsaturated ketones, benzyl acetones and phenacyl ethers, respectively, in moderate to good yields at roomtemperature using diethyl aluminium chloride (Et2AlCl) as a Lewis acid.
Bisulfate Salt-Catalyzed Friedel–Crafts Benzylation of Arenes with Benzylic Alcohols
作者:Ren-Jin Tang、Thierry Milcent、Benoit Crousse
DOI:10.1021/acs.joc.8b02361
日期:2018.11.16
We report here a method of direct Friedel–Craftsbenzylation of arenes with benzylic alcohols using cheap and readily available bisulfate salt as the catalyst in hexafluoroisopropanol. The catalytic system is powerful with a quite diverse group of functionalized arenes and benzylic alcohols. These mild conditions provide a straightforward synthesis of a variety of unsymmetrical diarylmethanes in high
Benzylation of arenes through FeCl3-catalyzed Friedel–Crafts reaction via C–O activation of benzyl ether
作者:Bi-Qin Wang、Shi-Kai Xiang、Zuo-Peng Sun、Bing-Tao Guan、Ping Hu、Ke-Qing Zhao、Zhang-Jie Shi
DOI:10.1016/j.tetlet.2008.04.117
日期:2008.6
Various benzyl ethers were converted to benzyl arenes via a FeCl3-catalyzed Friedel–Crafts alkylation reaction under mild condition in good yields. This method also offered a simple and practical approach to synthesize di- or tri-aryl methanes and aryl heteroaryl methanes through the activation of C–O bonds.
An Efficient and Inexpensive Catalyst System for Friedel‐Crafts Alkylation of Aromatic Compounds with Benzyl and Allyl Alcohols
作者:Jin‐Heng Li、Wen‐Jie Liu、Du‐Lin Yin
DOI:10.1081/scc-200028600
日期:2004.1
An new strategy that uses Ce2(SO4)3 as an effective catalyst for Friedel‐Crafts alkylation of aromatic compounds with benzyl and allyl alcohols is presented. In the presence of 1 to 10 mol% of Ce2(SO4)3, Friedel‐Crafts alkylation with both benzylalcohols, including primary and secondary benzylalcohols, and allyl alcohol were carried out smoothly and efficiently. Moreover, the catalyst was recovered
Versatile mesoporous carbonaceous materials for acid catalysis
作者:Vitaly L. Budarin、James H. Clark、Rafael Luque、Duncan J. Macquarrie
DOI:10.1039/b614537j
日期:——
Starbon mesoporous materials were synthesized after pyrolysis of expanded starch and subsequently functionalised with sulfonated groups, providing highly active and reusable materials in various acid catalysed reactions.