Synthesis of benzophenones from geminal biaryl ethenes using m-chloroperbenzoic acid
摘要:
The oxidation of geminal biaryl ethenes 3 and 1,3-enynes 5 using m-chloroperbenzoic acid in dichloromethane at room temperature presents a catalyst-free approach for the synthesis of functionalized benzophenones 4 and ynones 6, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
aryl(o‐tolyl)methanones with arylsulfonyl hydrazides or arylsulfonyl chlorides has been developed. Arylsulfonyl hydrazides and arylsulfonyl chlorides were employed as sulfonylating reagents respectively to complete this transformation. During the reaction, enols were generated in situ from aryl(o‐tolyl)methanones under UV irradiation, and subsequently reacted with sulfonyl radicals to provide a range of aryl(2
Herein reported is a dehydrative allylation reaction of 2-alkylbenzophenones with allylic alcohols promoted by light and palladium. Photoirradiation of 2-alkylbenzophenones generates nucleophilic s...
Chiral iridium complexes ligated by anionic oxazoline-bearing NCP-type pincer ligands were developed and applied to the asymmetric transfer hydrogenation (ATH) of diarylethenes using environmentally benign ethanol as the hydrogen donor. High enantioselectivities could be achieved for substrates bearing ortho-Me, ortho-Cl, or ortho-Br substituents on one of the aryl groups. The ATH of ortho-Br-substituted
开发了由带有阴离子恶唑啉的 NCP 型钳形配体连接的手性铱配合物,并将其应用于使用环境友好型乙醇作为氢供体的二芳基乙烯的不对称转移氢化 (ATH)。对于在芳基之一上带有邻-Me、邻-Cl或邻-Br取代基的底物可以实现高对映选择性。由于 C (芳基) -Br 键易于经历各种新的键形成事件,邻位-Br 取代的二芳基乙烯的 ATH特别有吸引力。
Asymmetric Photoenolization/Diels–Alder Reaction of 2-Methylbenzaldehydes and 2-Alkylbenzophenones with Chromones
enantioselective photoenolization/Diels–Alder reaction of 2-methylbenzaldehydes with chromones. Chiral N,N′-dioxide/ScIII and YbIII complexes were found to interact with both photoenol intermediates and chromones simultaneously, accelerating the Diels–Alder reaction in an efficient and stereoselective manner. Experimental studies and DFT calculations were carried out to understand the reaction mechanism and the
Synthesis of benzophenones from geminal biaryl ethenes using m-chloroperbenzoic acid
作者:Fateh V. Singh、Humberto M.S. Milagre、Marcos N. Eberlin、Helio A. Stefani
DOI:10.1016/j.tetlet.2009.02.164
日期:2009.5
The oxidation of geminal biaryl ethenes 3 and 1,3-enynes 5 using m-chloroperbenzoic acid in dichloromethane at room temperature presents a catalyst-free approach for the synthesis of functionalized benzophenones 4 and ynones 6, respectively. (C) 2009 Elsevier Ltd. All rights reserved.