10072-09-0Relevant articles and documents
Supramolecular Catalysis of Acyl Transfer within Zinc Porphyrin-Based Metal-Organic Cages
Li, Lili,Yang, Linlin,Li, Xuezhao,Wang, Jing,Liu, Xin,He, Cheng
supporting information, p. 8802 - 8810 (2021/06/28)
To illustrate the supramolecular catalysis process in molecular containers, two porphyrinatozinc(II)-faced cubic cages with different sizes were synthesized and used to catalyze acyl-transfer reactions between N-acetylimidazole (NAI) and various pyridylcarbinol (PC) regioisomers (2-PC, 3-PC, and 4-PC). A systemic investigation of the supramolecular catalysis occurring within these two hosts was performed, in combination with a host-guest binding study and density functional theory calculations. Compared to the reaction in a bulk solvent, the results that the reaction of 2-PC was found to be highly efficient with high rate enhancements (kcat/kuncat = 283 for Zn-1 and 442 for Zn-2), as well as the different efficiencies of the reactions with various ortho-substituted 2-PC substrates and NAI derivates should be attributed to the cages having preconcentrated and preoriented substrates. The same cage displayed different catalytic activities toward different PC regioisomers, which should be mainly attributed to different binding affinities between the respective reactant and product with the cages. Furthermore, control experiments were carried out to learn the effect of varying reactant concentrations and product inhibition. The results all suggested that, besides the confinement effect caused by the inner microenvironment, substrate transfer, including the encapsulation of the reactant and the release of products, should be considered to be a quite important factor in supramolecular catalysis within a molecular container.
A 3 - pyridine formaldehyde synthetic method
-
Paragraph 0032; 0034; 0037; 0039; 0042; 0044, (2019/05/28)
The present invention relates to machine the chemical field, in particular to a 3 - pyridine formaldehyde synthetic method, comprises the following steps: 1, to 3 - methyl pyridine as raw materials, under acidic conditions, through the oxidation reaction
Synthetic method of 3-pyridylaldehyde
-
Paragraph 0032; 0034; 0039; 0044, (2017/11/18)
The invention relates to the field of organic chemistry, in particular to a synthetic method of 3-pyridylaldehyde. The synthetic method comprises the following steps: 1, taking 3-methyl pyridine as a raw material and obtaining 3-pyridine nitrogen oxide through oxidation reaction under an acidic condition; 2, synthesizing the 3-pyridine nitrogen oxide into acetic acid-3-pyridine methyl ester through acetic anhydride rearrangement; 3, hydrolyzing the acetic acid-3-pyridine methyl ester to obtain 3-pyridine methanol; 4, performing oxidation reaction on the 3-pyridine methanol to obtain 3-pyridylaldehyde. After the synthetic method is adopted, the 3-methyl pyridine is used as the raw material, and the 3-pyridine methanol is obtained through N-oxidation, rearrangement and hydrolyzation and is further oxidized to obtain the 3-pyridylaldehyde. The synthetic method provided by the invention is high in total yield, low in raw material price, short in reaction time, mild in condition, and simple in process operation.