An efficient synthesis of unsymmetrical diarylmethanes from the dehydration of arenes with benzyl alcohols using InCl3·4H2O/acetylacetone catalyst system
摘要:
An efficient and practical synthesis of unsymmetrical diarylmethanes has been achieved from the dehydration of arenes with benzyl alcohols in the presence of catalytic amount of InCl3 center dot 4H(2)O/acetylacetone. (C) 2007 Elsevier Ltd. All rights reserved.
Conversion of Aryl Aldehydes to Benzyl Iodides and Diarylmethanes by H<sub>3</sub>PO<sub>3</sub>/I<sub>2</sub>
作者:Fang Lv、Jing Xiao、Junchun Xiang、Fengzhe Guo、Zi-Long Tang、Li-Biao Han
DOI:10.1021/acs.joc.0c02850
日期:2021.2.5
reductive benzylation reactions with aryl aldehydes. By using a H3PO3/I2 combination, various aromaticaldehydes underwent iodination reactions and Friedel–Crafts typereactions with arenes via benzyl iodide intermediates, readily producing benzyl iodides and diarylmethanes in good yields. Intramolecular cyclization reactions also took place, giving the corresponding cyclic compounds. This new strategy features
在与芳基醛的苄基还原反应中,H 3 PO 3首次被用作还原剂和促进剂。通过使用H 3 PO 3 / I 2组合,各种芳族醛经过苄基碘中间体与芳烃进行碘化反应和Friedel-Crafts型反应,可轻松以高收率生产苄基碘和二芳基甲烷。分子内环化反应也发生,得到相应的环状化合物。这种新策略具有易于处理,低成本和无金属的条件。
Benzylation of Arenes with Benzyl Halides under Promoter-Free and Additive-Free Conditions
It was found that benzyl chlorides and bromides could directly react with electron‐rich arenes, which provided an example of promoter‐ and additive‐free benzylation of arenes.
A new method for the efficient synthesis of diarylmethanes via a radical process involving thermolysis of bis(arylmethyl)tin dichlorides in the presence of arenes is reported. The intermediate arylmethyl radical can be trapped with TEMPO.
报道了一种通过自由基过程有效合成二芳基甲烷的新方法,该过程涉及在芳烃存在下热解双(芳基甲基)二氯化锡。中间芳基甲基自由基可以用 TEMPO 捕获。
Synthesis of diarylmethanes via a Friedel–Crafts benzylation using arenes and benzyl alcohols in the presence of triphenylphosphine ditriflate
作者:Mohammad Mehdi Khodaei、Ehsan Nazari
DOI:10.1016/j.tetlet.2012.07.051
日期:2012.9
Triphenylphosphine ditriflate (TPPD) was found to be an efficient promoter for the Friedel–Craftsbenzylation of arenes with benzyl alcohols in CH2Cl2 at room temperature. The good yields, the 1:1 molar ratio of arene and benzyl alcohol, the benzylation of chlorobenzene as a nonactivated aromatic compound at room temperature, and no by-product formation are the main advantages of this procedure.