55339-51-0Relevant academic research and scientific papers
Palladium-catalyzed anti-Markovnikov oxidative acetalization of activated olefins with iron(iii) sulphate as the reoxidant
Fernandes, Rodney A.,Kumar, Praveen,Yadav, Sandhya S.
, p. 427 - 443 (2022/01/20)
This paper discloses the efficient palladium-catalyzed anti-Markovnikov oxidative acetalization of activated terminal olefins with iron(iii) sulfate as the reoxidant. This methodology requires mild reaction conditions and shows high regioselectivity toward anti-Markovnikov products and compatibility with a wide range of functional groups. Iron(iii) sulphate was the sole reoxidant used in this method. Various olefins like vinylarenes, aryl-allylethers, aryl or benzyl acrylates and homoallylic alcohols all reacted well providing anti-Markovnikov acetals, some of which represent orthogonally functionalized 1,3- and 1,4-dioxygenated compounds.
Copper-catalyzed three-component reaction of arylhydrazine hydrochloride, DABSO, and NFSI for the synthesis of arenesulfonyl fluorides
Chen, Qing-Yun,Guo, Yong,Hu, Xiaojun,Liu, Chao,Liu, Yongan,Ma, Xiaoyu,Pan, Qijun,Pang, Wan,Wu, Jingjing
supporting information, p. 8999 - 9003 (2021/11/04)
This paper reports a convenient copper-catalyzed three-component conversion of arylhydrazine hydrochlorides to arenesulfonyl fluorides in good yields under mild conditions, using 1,4-diazabicyclo [2.2.2]octane bis(sulfur dioxide) (DABSO) as a sulfonyl source andN-fluorobenzenesulfonimide (NFSI) as a fluorine source based on a radical sulfur dioxide insertion and fluorination strategy. Notably, arylhydrazine hydrochloride is used as a safe precursor of aryl radicals.
An efficient approach to 3-thioether-functionalized 2,3-dihydrobenzofurans via a metal-free intramolecular radical cyclization/thiolation cascade reaction
Chen, Tingting,Zheng, Renhua,Yu, Jingmiao
supporting information, p. 2204 - 2212 (2021/05/29)
A diverse series of 3-thioether-functionalized 2,3-dihydrobenzofurans were prepared by an intramolecular radical cyclization/thiolation cascade reaction of alkenyl-tethered arenediazonium salts with thiophenols under transition-metal-free conditions. The
Investigating the microwave-accelerated Claisen rearrangement of allyl aryl ethers: Scope of the catalysts, solvents, temperatures, and substrates
Hui, Zi,Jiang, Songwei,Qi, Xiang,Ye, Xiang-Yang,Xie, Tian
supporting information, (2020/05/18)
The microwave-accelerated Claisen rearrangement of allyl aryl ethers was investigated, in order to gain insight into the scope of the catalysts, solvents, temperatures, and substrates. Among the catalysts examined, phosphomolybdic acid (PMA) was found to greatly accelerate the reaction in NMP, at temperatures ranging from 220 to 300 °C. This method was found to be useful for preparing several intermediates previously reported in the literature using precious metal catalysts such as Au(I), Ag(I), and Pt(II). Additionally, substrates bearing bromo and nitro groups on the aryl portion required careful tailoring of the reaction conditions to avoid complex product profiles.
Base-mediated intramolecular one-pot double-cyclization of epoxide-tethered 2-fluorobenzenesulfonamides: An avenue to 1,4-benzoxazine-fused benzothiaoxazepine-1,1-dioxides
Das, Jonali,Borah, Biraj Jyoti,Das, Sajal Kumar
supporting information, p. 220 - 224 (2020/01/13)
Herein, we describe the synthesis of hitherto unknown 1,4-benzoxazine-fused benzothiaoxazepine-1,1-dioxides by a NaH-promoted intramolecular one-pot double-cyclization of epoxide-tethered 2-fluorobenzene sulfonamides. Mechanistically, the reactions proceed via an intramolecular epoxide ring-opening followed by an intramolecular nucleophilic aromatic substitution. The high yields, mild conditions, complete regio- and diastereoselectivity, and a wide substrate scope render this protocol well suited for drug discovery efforts.
Boron-Promoted Ether Interchange Reaction: Synthesis of Alkyl Nitroaromatic Ethers from Methoxynitroarenes
Liu, Zhenwei,Luan, Nannan,Lu, Hongtao,Liang, Apeng,Li, Jingya,Zou, Dapeng,Wu, Yangjie,Wu, Yusheng
, p. 702 - 707 (2020/02/11)
The first protocol for boron-promoted ether interchange reaction of methoxynitroarenes was described. A series of methoxynitroarenes and alcohols, including primary, secondary, as well as tertiary alcohols were reacted smoothly in moderate to good yields under the optimized reaction conditions. This protocol constitutes an operationally simple and scalable strategy for the synthesis of alkyl nitroaromatic ethers. Moreover, the new reactivity of boron reagents was discovered.
Process for synthesizing ramalin not using Tin as a heavy metal
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Paragraph 0041; 0044-0046, (2019/09/07)
The present invention relates to a method for synthesizing ramalin. More particularly, the present invention relates to the method for preparing ramalin by conducting a reaction of a glutamic acid derivative manufactured by using alkyl chloroformate with
Pd-Catalyzed Enantioselective Double Heck Reaction
Ju, Baihang,Chen, Shigui,Kong, Wangqing
supporting information, p. 9343 - 9347 (2019/12/02)
An asymmetric Pd-catalyzed intramolecular followed by an intermolecular double Heck reaction of arenediazonium salts with simple alkenes is disclosed. This reaction features mild reaction conditions, simple operation, and excellent functional group tolera
Facile one-pot synthesis of aliphatic bridged diaryloxy compounds, cyclic and crown ethers under mild conditions
Sakate, Sachin,Kamble, Sumit,Chikate, Rajiv,Rode, Chandrashekhar
, p. 462 - 470 (2017/03/27)
We report here the facile, room temperature, catalyst free, one pot synthesis of aliphatic bridged diaryloxy compounds, cyclic and crown ethers. Anhydrous potassium carbonate (K2CO3) as a mild base along with dimethyl sulfoxide gener
Copper-catalyzed carbochlorination or carbobromination via radical cyclization of aryl amines
Ouyang, Jianing,Su, Xiaolong,Chen, Yu,Yuan, Yaofeng,Li, Yi
supporting information, p. 1438 - 1441 (2016/03/12)
A copper-catalyzed radical carbochlorination or carbobromination is reported. Intramolecular cyclization occurred through aryl radicals generated in situ from bench-stable aryl amines with aqueous hydrogen halides as the halogen sources. A variety of (3-h
