456-48-4Relevant articles and documents
A synergistic effect in the combination of H2O2, FeAPO-5 and NaBr for selective oxidation of benzyl alcohols
Qi, Lin,Qi, Xingyi,Wang, Jing,Zheng, Liwei
, p. 225 - 228 (2011)
The H2O2/FeAPO-5/NaBr combination has been found to be active in the oxidation of benzyl alcohols. The remarkably different activity results obtained with the H2O2/FeAPO-5/NaBr, the H 2O2/FeAPO-5 and the H2O2/NaBr confirm the existence of a strongly synergistic effect in the ternary reaction system of H2O2, FeAPO-5 and NaBr, leading to a significantly enhanced conversion of benzyl alcohols under mild reaction conditions.
Natural heterogeneous catalysis with immobilised oxidase biocatalysts
Angelastro, Antonio,Baldwin, Christopher,Birmingham, William R.,Cosgrove, Sebastian C.,Flitsch, Sabine L.,Heath, Rachel S.,Mattey, Ashley P.,Ramsden, Jeremy I.,Sangster, Jack J.,Turner, Nicholas J.
, p. 19501 - 19505 (2020)
The generation of immobilised oxidase biocatalysts allowing multifunctional oxidation of valuable chemicals using molecular oxygen is described. Engineered galactose oxidase (GOase) variants M1and M3-5, an engineered choline oxidase (AcCO6) and monoamine oxidase (MAO-N D9) displayed long-term stability and reusability over several weeks when covalently attached on a solid support, outperforming their free counterparts in terms of stability (more than 20 fold), resistance to heat at 60 °C, and tolerance to neat organic solvents such as hexane and toluene. These robust heterogenous oxidation catalysts can be recovered after each reaction and be reused multiple times for the oxidation of different substrates.
Nitrosoarene-Catalyzed HFIP-Assisted Transformation of Arylmethyl Halides to Aromatic Carbonyls under Aerobic Conditions
Pradhan, Suman,Sharma, Vishali,Chatterjee, Indranil
supporting information, p. 6148 - 6152 (2021/08/03)
A rare metal-free nucleophilic nitrosoarene catalysis accompanied by highly hydrogen-bond-donor (HBD) solvent, 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), organocatalytically converts arylmethyl halides to aromatic carbonyls. This protocol offers an effective means to access a diverse array of aromatic carbonyls with good chemoselectivity under mild reaction conditions. The activation of arylmethyl halides by HFIP to generate stable carbocation and autoxidation of in situ generated hydroxylamine to nitrosoarene in the presence of atmospheric O2 are the keys to success.
Combining photo-redox and enzyme catalysis for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives in one pot
Yu, Yuan,Lu, Wei-Fan,Yang, Zeng-Jie,Wang, Na,Yu, Xiao-Qi
supporting information, (2020/12/25)
A novel strategy combining visible-light and enzyme catalysis in one pot for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives from alcohols is described for the first time. Fourteen 4H-pyrimido[2,1-b] benzothiazole derivatives were prepared with yields of up to 98% under mild reaction conditions by a simple operation. The photoorgano catalyst rose Bengal (rB) was employed to oxyfunctionalise alcohols to aldehydes. Compared with aldehydes, alcohols with more stable properties and lower cost, thus we used photocatalysis to oxidize alcohols into aldehydes. Next, the enzyme was used to further catalyze the reaction of Biginelli to produce the target product of 4H-pyrimidine [2,1-b] benzothiazole. Experimental results show that this method provides a more efficient and eco-friendly strategy for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives.