3446-89-7Relevant articles and documents
Copper(II)-Ethanolamine Triazine Complex on Chitosan-Functionalized Nanomaghemite for Catalytic Aerobic Oxidation of Benzylic Alcohols
Hasanpour, Benyamin,Jafarpour, Maasoumeh,Feizpour, Fahimeh,Rezaeifard, Abdolreza
, p. 45 - 55 (2021)
Abstract: In this study a novel, effective and recoverable Cu(II)-catalyst was synthesized by incorporating of Cu(OAc)2 within ethanolamine-triazine derivative (TAETA) attached to chitosan (Chs)-functionalized γ-Fe2O3 nanoparticles [MNP@Chs/TAETA-Cu(II)]. It was characterized by different techniques such as FT-IR, EDS, ICP, TEM, TGA and VSM. The as-prepared nanocomposite demonstrated high oxidation activity and desired selectivity in the aerobic oxidation of structurally diverse set of benzyl alcohols. Spectral results and leaching experiments revealed that this magnetically recoverable heterogeneous catalyst preserved its structure after it was reused several?times. This protocol offers some beneficial features such as the use of oxygen as an ideal oxidant, stability of nanocomplex, easily catalyst separation by using an external magnetic field and efficient recycling as well as the lack of by-products. Graphic Abstract: [Figure not available: see fulltext.]
Design and synthesis of a highly efficient heterogeneous MnCo2O4 oxide catalyst for alcohol oxidation: DFT insight into the synergistic effect between oxygen deficiencies and bimetal species
Li, Dandan,Ruan, Fei,Jin, Yangxin,Ke, Qingping,Cao, Yali,Wang, Hao,Wang, Tingting,Song, Yujun,Cui, Ping
, p. 418 - 424 (2019)
The synergistic effect in multi-active site catalysts is difficult to monitor, and the effect of their intrinsic mechanism on their catalytic performance is important but very difficult to understand owing to the large quantities of active species. Based on the results of density functional theory, herein we report the design and synthesis of an oxygen vacancy-abundant spinel-structured MnCo2O4 oxide as a highly efficient catalyst for alcohol oxidation, which highlights the importance of the synergistic effect between oxygen deficiencies and bimetal species.
Highly atom efficient synthesis of 2,2,4,5-tetrasubstituted 3(2H)-furanones having both hydroxyl and amino substituents
Antony, Jesna,Mathai, Sindhu,Natarajan, Rakesh,P. Musthafa, Sumi,Rappai, John P.,S. Devaky, Karakkattu
supporting information, (2022/02/25)
We have developed a highly atom efficient synthesis of tetrasubstituted 3(2H)-furanones from easily accessible starting materials such as C,N-diarylaldonitrones and dibenzoylacetylene. Control experiments revealed that reaction of aldonitrones having electron-withdrawing groups on the C-aryl substituent in polar aprotic solvents exhibited high product selectivity while reaction temperature has only a negligible effect on product yield and selectivity.
Preparation method of p-methylsulfonyl benzaldehyde
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Paragraph 0012; 0027; 0031; 0033; 0037; 0039; 0043; 0045..., (2021/07/24)
The invention relates to a preparation method of p-methylsulfonyl benzaldehyde, and solves the technical problems that the existing preparation method is unreasonable, high in raw material toxicity, complex in operation, high in cost, high in three-waste yield, low in yield and unsuitable for industrial product. The preparation method of p-methylsulfonyl benzaldehyde takes p-nitroformaldehyde as a raw material and sodium sulfide as a reducing agent, and the preparation method comprises the following steps: carrying out a reduction reaction under an alkaline condition to generate p-aminobenzaldehyde, dropwise adding sodium methyl mercaptide into the p-aminobenzaldehyde in the presence of hydrochloric acid and sodium nitrite, carrying out a diazo reaction and a substitution reaction to generate p-methylthiobenzaldehyde, and oxidizing the p-methylthiobenzaldehyde by using hydrogen peroxide under an acidic condition to obtain the p-methylsulfonyl benzaldehyde. The method can be widely applied to the technical field of veterinary drug and medicine raw material medicine synthesis.
PhIO-Mediated oxidative dethioacetalization/dethioketalization under water-free conditions
Du, Yunfei,Ouyang, Yaxin,Wang, Xi,Wang, Xiaofan,Yu, Zhenyang,Zhao, Bingyue,Zhao, Kang
, p. 48 - 65 (2021/06/16)
Treatment of thioacetals and thioketals with iodosobenzene in anhydrous DCM conveniently afforded the corresponding carbonyl compounds in high yields under water-free conditions. The mechanistic studies indicate that this dethioacetalization/dethioketalization process does not need water and the oxygen of the carbonyl products comes from the hypervalent iodine reagent.
Nickel-Catalyzed Reversible Functional Group Metathesis between Aryl Nitriles and Aryl Thioethers
Delcaillau, Tristan,Boehm, Philip,Morandi, Bill
supporting information, p. 3723 - 3728 (2021/04/07)
We describe a new functional group metathesis between aryl nitriles and aryl thioethers. The catalytic system nickel/dcype is essential to achieve this fully reversible transformation in good to excellent yields. Furthermore, the cyanide- and thiol-free reaction shows high functional group tolerance and great efficiency for the late-stage derivatization of commercial molecules. Finally, synthetic applications demonstrate its versatility and utility in multistep synthesis.
N-bromosuccinimide/HCl mediated reduction of sulfoxides to sulfides
Wang, Jianqiang,Shi, Fangmin,Dai, Dongyan,Xiong, Liping,Yang, Yongpo
supporting information, p. 439 - 443 (2021/02/03)
An efficient reduction of sulfoxides to sulfides mediated by N-bromosuccinimide (NBS)/HCl system has been developed. This protocol shows good functional group compatibility as well as broad substrates scope with operational simplicity.
Aerobic oxidation and oxidative esterification of alcohols through cooperative catalysis under metal-free conditions
Karimi, Babak,Ghahremani, Mina,Vali, Hojatollah,Ciriminna, Rosaria,Pagliaro, Mario
supporting information, p. 8897 - 8900 (2021/09/10)
The ABNO@PMO-IL-Br material obtained by anchoring 9-azabicyclo[3.3.1]nonane-3-oneN-oxyl (keto-ABNO) within the mesopores of periodic mesoporous organosilica with bridged imidazolium groups is a robust bifunctional catalyst for the metal-free aerobic oxidation of numerous primary and secondary alcohols under oxygen balloon reaction conditions. The catalyst, furthermore, can be successfully employed in the first metal-free self-esterification of primary aliphatic alcohols affording valued esters.
Metal- And additive-free C-H oxygenation of alkylarenes by visible-light photoredox catalysis
García Manche?o, Olga,Kuhlmann, Jan H.,Pérez-Aguilar, María Carmen,Piekarski, Dariusz G.,Uygur, Mustafa
supporting information, p. 3392 - 3399 (2021/05/21)
A metal- and additive-free methodology for the highly selective, photocatalyzed C-H oxygenation of alkylarenes under air to the corresponding carbonyls is presented. The process is catalyzed by an imide-acridinium that forms an extremely strong photooxidant upon visible light irradiation, which is able to activate inert alkylarenes such as toluene. Hence, this is an easy to perform, sustainable and environmentally friendly oxidation that provides valuable carbonyls from abundant, readily available compounds.
Nickel catalyzed hydrosilane reduction of (het)arenecarboxylic acids into aldehydes
Wang, Liang,Wang, Yaoyao,Tao, Yu,Zhang, Nana,Li, Shubai
, p. 271 - 273 (2021/05/04)
Nickel-catalyzed reduction of (het)arenecarboxylic acids with hydrosilanes in the presence of dimethyl dicarbonate as the activator affords the corresponding aldehydes. The role of the activator is the conversion of the acids into their anhydrides undergoing C–O cleavage. The good yields were achieved in case of substrates bearing electron-donating and electron-neutral groups.
