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, 15804-19-0, name is Quinoxaline-2,3(1H,4H)-dione, introducing its new discovery. Recommanded Product: Quinoxaline-2,3(1H,4H)-dione
Phosphonium chloride as a non-volatile chlorinating reagent: Preparation and reaction in no solvent or ionic liquid
Reaction of triphenylphosphine with trichloroisocyanuric acid in no solvent or an ionic liquid gave the corresponding phosphonium chloride, which can be used as a cheap and safe chlorinating reagent. Conversion of hydroxyheterocycles to chloroheterocycles, carboxylic acids to carboxylic acid chlorides, and primary amides to nitriles were accomplished by using the phosphonium chloride in excellent to good yields.
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Reference：
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N398 | ChemSpider