Adding a certain compound to certain chemical reactions, such as: 64951-08-2, Imidazo[1,2-a]pyridine-2-carboxylic acid, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, name: Imidazo[1,2-a]pyridine-2-carboxylic acid, blongs to pyridine-derivatives compound. name: Imidazo[1,2-a]pyridine-2-carboxylic acid
Working Example 47 To a mixture of 3-methoxymethyl-1-(3,4,5-trimethoxybenzyl)piperazine dihydrochloride (500 mg) obtained in Reference Example 14, imidazo[1,2-a]pyridine-2-carboxylic acid (211 mg), triethylamine (657 mg) and N,N-dimethylformamide (3 ml) is added dropwise under ice-cooling, while stirring, a solution of diethyl cyanophosphonate (277 mg) in N,N-dimethylformamide (1 ml), and the mixture is stirred for one hour. The reaction mixture is poured into ice-water and extracted with ethyl acetate. The organic layer is washed with water, dried and concentrated under reduced pressure. The concentrate is purified by means of a silica gel column chromatography (eluent: ethyl acetate), followed by recrystallization to give 2-[2-methoxymethyl-4-(3,4,5-trimethoxybenzyl)piperazin-1-ylcarbonyl]imidazo[1,2-a]-pyridine as colorless prisms (354 mg), m.p. 129-130C.
At the same time, in my other blogs, there are other synthetic methods of this type of compound,64951-08-2, Imidazo[1,2-a]pyridine-2-carboxylic acid, and friends who are interested can also refer to it.
Reference:
Patent; Takeda Chemical Industries, Ltd.; EP368670; (1990); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem