52008-98-7Relevant academic research and scientific papers
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.
Catalysts, Methods of Makting Catalysts, and Methods of Use
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Page/Page column 9, (2012/03/26)
Embodiments of the present disclosure provide for acyclic diaminocarbenes (ADCs) catalysts such as those shown in FIG. 1.1 and in the Examples, methods of making catalysts, methods of using catalysts, and the like. Catalyst of the present disclosure can b
Novel acyclic diaminocarbene ligands with increased steric demand and their application in gold catalysis
Seo, Hwimin,Roberts, Benjamin P.,Abboud, Khalil A.,Merz Jr., Kenneth M.,Hong, Sukwon
supporting information; experimental part, p. 4860 - 4863 (2011/02/22)
Sterically demanding and conformationally stable N,N′- ditertiaryalkyl-N,N′-diphenyl acyclic diaminocarbenes (ADCs) were developed. Bulky ADC-Au catalysts not only showed competitive reactivities in hydroamination and enyne cyclization but also demonstrat
The Chemistry of N-Substituted Benzotriazoles. Part 20. Mono-N-t-Butylation of Aromatic and Heteroaromatic Amines
Katritzky, Alan R.,Eynde, Jean-Jacques Vanden
, p. 639 - 642 (2007/10/02)
Adducts R1CH(Bt)NHAr, readily available from aldehydes, primary aromatic or heteroaromatic amines, and benzotriazole are converted by H2O2-SeO2 into mixtures of R1CONHAr and HCONR1Ar in proportions which depend rationally on the nature of the R1 group.For R1=But, the formamide HCON(But)Ar is formed in satisfactory yields thus enabling the title reaction to be achieved.
