25983-13-5, Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬Which mentioned a new discovery about 25983-13-5
A method for preparing cephalosporin lorraine ester intermediate (by machine translation)
The invention provides a method for preparing cephalosporin lorraine ester intermediate, comprises the following steps: in a free radical initiator under the catalysis, 3 – chlorine spore with 4 – (4 – pyridyl) – 2 – mercapto thiazole generate condensation reaction, the recurrence of quaternization reaction, to obtain the pyridine salt; then for the protection of the skin of a pot, to obtain cephalosporin lorraine ester intermediate. Compared with the prior art, the present invention relates to 3 – chlorine spore as the initial reactant, for the first application; 3 – chlorine spore with 4 – (4 – pyridyl) – 2 – mercapto thiazole condensation reaction by free radical initiator catalytic, and is safe, convenient processing, which belongs to the environment-friendly reaction type, at the same time the reaction is greatly reduced and the generation of the isomer; using the one-pot synthesis at the same time get rid of 4 bits and the 7 position of the protecting group, thereby greatly simplifying the reaction process, and improves the reaction yield and the quality of the product. The synthesis method simple technology, without harsh reaction conditions and the like, is extremely suitable for industrial production. (by machine translation)
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Reference£º
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1839 | ChemSpider