90784-34-2Relevant articles and documents
Tetracoordinate borates as catalysts for reductive formylation of amines with carbon dioxide
Du, Chen-Xia,Huang, Zijun,Jiang, Xiaolin,Li, Yuehui,Makha, Mohamed,Wang, Fang,Zhao, Dongmei
supporting information, p. 5317 - 5324 (2020/09/17)
We report sodium trihydroxyaryl borates as the first robust tetracoordinate organoboron catalysts for reductive functionalization of CO2. These catalysts, easily synthesized from condensing boronic acids with metal hydroxides, activate main group element-hydrogen (E-H) bonds efficiently. In contrast to BX3 type boranes, boronic acids and metal-BAr4 salts, under transition metal-free conditions, sodium trihydroxyaryl borates exhibit high reactivity of reductive N-formylation toward a variety of amines (106 examples), including those with functional groups such as ester, olefin, hydroxyl, cyano, nitro, halogen, MeS-, ether groups, etc. The over-performance to catalyze formylation of challenging pyridyl amines affords a promising alternative method to the use of traditional formylation reagents. Mechanistic investigation supports electrostatic interactions as the key for Si/B-H activation, enabling alkali metal borates as versatile catalysts for hydroborylation, hydrosilylation, and reductive formylation/methylation of CO2.
Catalyst-Free Transamidation of Aromatic Amines with Formamide Derivatives and Tertiary Amides with Aliphatic Amines
Yin, Jiawen,Zhang, Jingyu,Cai, Changqun,Deng, Guo-Jun,Gong, Hang
supporting information, p. 387 - 392 (2019/01/11)
A simple catalyst- and promoter-free protocol has been developed for the transamidation of weakly nucleophilic aromatic amines with formamide derivatives and low-reactivity tertiary amides with aliphatic amines. This strategy is advantageous because no catalyst or promoters are needed, no additives are required, separation and purification is easy, and the reaction is scalable. Significantly, this strategy was further applied to synthesize several pharmaceutical molecules on a gram scale, and excellent yields were achieved.
Method for preparing formamide derivative by using catalyst-free transamination reaction
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Paragraph 0046; 0047, (2019/02/13)
The invention discloses a method for synthesizing a formamide derivative by using a low-reactive catalyst-free and solvent-free tertiary amide and aliphatic amine transamination reaction, wherein thehigh-yield formamide derivative is obtained by directly using N,N-dimethylformamide (DMF) as a formyl source. According to the present invention, the method has advantages of inexpensive and easily available raw materials, inexpensive and easily available acylating reagent, high reaction yield, one-step reaction, low cost, high reaction selectivity, simple operation and the like, and can overcomethe defects of high toxicity of the reaction reagent, requirement of different types of catalysts, high cost, more reaction steps, more by-products and the like in the prior art.
Mn(II)-Catalyzed N -Acylation of Amines
Ma, Juan,Zhang, Jingyu,Gong, Hang
, p. 693 - 703 (2019/01/23)
A practical protocol has been developed here for the Mn(II)-catalyzed N -acylation of amines with high yields using N, N -dimethylformamide and other amides as the carbonyl source. The protocol is simple, does not require any acid, base, ligand, or other additives, and encompasses a broad substrate scope for primary, secondary, and heterocyclic amines.
Method for synthesis of formamide derivatives by cobalt catalysis of formylation reaction
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Paragraph 0062; 0063, (2018/04/21)
The invention discloses a method for synthesis of formamide derivatives by cobalt catalysis of formylation reaction. The method comprises that the formamide derivatives are produced by one-pot reaction of amine compounds and formamide compounds under the catalysis of cobalt salts; the method has the advantages of cheap and easily obtained reaction raw materials and catalysts, simple reaction stepsand operation, high reaction selectivity, high yield, extendable reaction and the like, and overcomes the defects of high reaction reagent toxicity, expensive catalysts, more reaction steps, more byproducts and the like in the prior art.
Cobalt(II)-Catalyzed N-Acylation of Amines through a Transamidation Reaction
Ma, Juan,Zhang, Feng,Zhang, Jingyu,Gong, Hang
, p. 4940 - 4948 (2018/09/25)
A practical protocol has been developed for a Co(OAc)2·4H2O-catalyzed transamidation reaction. The reaction gives high yields and uses N,N-dimethylformamide and other amides as carbonyl sources. The protocol is rapid and simple, and it does not require any acids, bases, ligands, or other additives. It works well for a wide range of primary, secondary, and heterocyclic amines.
Method of using graphene oxide to catalyze formylation reaction to synthesize formamide derivative
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Paragraph 0060; 0061, (2018/05/16)
The invention discloses a method of using graphene oxide to catalyze formylation reaction to synthesize a formamide derivative. The method includes: allowing amine compound and formamide compound to be in one-pot reaction under catalytic action of graphene oxide to generate the formamide derivative. Reaction raw materials and a catalyst are low in cost and easy to obtain, the catalyst can be recycled, reaction steps and operations are simple, the method has the advantages of high reaction selectivity, high yield and supportiveness of expanding reaction, and the defects that reaction reagents are high in toxicity, catalysts are expensive, the number of reaction steps is large and the number of byproducts is large in the prior art are overcome.
N-formylation of amine using graphene oxide as a sole recyclable metal-free carbocatalyst
Ma, Juan,Zhang, Jingyu,Zhou, Xiao,Wang, Jiawei,Gong, Hang
, p. 2851 - 2860 (2018/10/31)
Abstract: Graphene oxide (GO), an inexpensive, environment-friendly, and metal-free carbocatalyst, used for the N-formylation of amines is developed. In this reaction, GO shows good activity, selectivity, and recyclability. This strategy has an array of advantages, such as being metal free, without additive, wide-scope protocol, scalable with a low catalyst loading of 3?wt%, use of readily available and recyclable carbocatalyst, and DMF as a readily available formyl source. Furthermore, this strategy provides an avenue for the convenient hydroformylation of various amines. Graphical abstract: [Figure not available: see fulltext.].
Method for synthesizing formamide derivative through Mn-catalyzed formylation reaction
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Paragraph 0057; 0058, (2018/05/16)
The invention discloses a method for synthesizing a formamide derivative through Mn-catalyzed formylation reaction. The method disclosed by the invention is characterized in that an amine compound anda formamide compound are subjected to one-pot reaction under the catalytic action of manganese salt to generate the formamide derivative. The method disclosed by the invention has the beneficial effects that reaction raw materials and a catalyst are cheap and easy to get, reaction steps and operation are simple, the advantages of high reaction selectivity, high yield and expandable reaction are achieved, and the defects that a reagent is high in toxicity, the catalyst is expensive, reaction steps are tedious and byproducts are more in the prior art are overcome.
Method for synthesizing formamide derivatives by molybdenum catalyzed formylation reaction
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Paragraph 0061; 0062, (2018/05/16)
The invention discloses a method for synthesizing formamide derivatives by molybdenum catalyzed formylation reaction. The method includes that the formamide derivatives are generated by one-pot reaction of amine compounds and formamide compounds under the catalytic action of molybdenum salts and/or molybdenum oxides. Reaction methods and catalysts are cheap and easy to acquire, reaction steps andoperations are simple, the method has advantages of high reaction selectivity, high yield, expandability in reaction and the like, and defects of high toxicity of reaction agents, expensive catalysts,complex reaction steps, high quality of by-products and the like in the prior art are overcome.
