In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 2213-63-0, name is 2,3-Dichloroquinoxaline, introducing its new discovery. category: quinoxaline
Synthesis of hetaryl glycosides and their glycosyl donor properties[1]
Anomeric O-hetarylation of tetra-O-benzyl- and tetra-O-acetylglucose (1a, b) can be directly performed with electrondeficient heteroaromatic/heterocyclic systems 2-14, which contain imide halide moieties. The reactions were carried out in the presence of a base and led, through an exchange of the halide by the glucopyranosyloxy moiety, to the products 2a-14a, 7b-14b. Predominantly or exclusively beta-products were obtained. Systems bearing more than one imide halide moiety, such as cyanuric fluoride (15) or 5-chloro-2,4,6-trifluoropyrimidine (16), can be employed for successive anomeric O-hetarylations. Investigation of the glycosyl donor properties of O-glucosyl heteroaromatic imidates with 6-O-and 4-O-unprotected glucose derivatives 18 and 19 as acceptors and comparison of the results obtained with data for the corresponding beta-trichloroacetimidates 17abeta and 17bbeta, reveals that 2,3,5,6-tetrafluoropyridin-4-yl glucopyranosides 14abeta and 14bbeta exhibit similar properties. For specific tasks, for instance alpha-glucopyranoside formation, 14abeta may even be advantageous.
We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 2213-63-0, and how the biochemistry of the body works.category: quinoxaline
Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1359 | ChemSpider