摘要:
Quinolin-2-yl benzoic acid compounds which are useful as intermediates of quinoline compounds having angiotensin II antagonist activity prepared by decarboxylating 2-(carboxyphenyl)-4-quinolinecarboxylic acid compounds in which a carboxyl group bonded to a phenyl group may be esterified, while a carboxyl group bonded to a quinoline ring is not esterified, and both rings may have one or more substituents inert to the decarboxylation reaction.
摘要:
This invention deals with an approach to control anionic polymerization. The anionic polymerization is conducted by adding a kind of initiator ligand compound, directly or in the form of solution into the monomer or initiator at the same or different time, or at different stages. The metal atoms in the ligand can form the association with the initiator cations, while the alkyloxy groups in the initiator ligand can restrict the entering channel of the addition of the monomers due to their relatively large volume or steric hindrance. Therefore, the initiator ligand compound can restrict the rate of anionic polymerization, restrain the side reaction, and make the anionic polymerization possible to be conducted at room or even higher temperature. The molar ratio of initiator ligand compound to initiator is from 0.01:1 to 20:1. Compared with present technologies, the method of this invention can control and adjust the homopolymerization and copolymerization rate, side reactions and the polymerization temperature, and make it possible to industrialize.
摘要:
This invention deals with an approach to control anionic polymerization. The anionic polymerization is conducted by adding a kind of initiator ligand compound, directly or in the form of solution into the monomer or initiator at the same or different time, or at different stages. The metal atoms in the ligand can form the association with the initiator cations, while the alkyloxy groups in the intiator ligand can restrict the entering channel of the addition of the monomers due to their relatively large volume or steric hindrance. Therfore, the initiator ligand compound can restrict the rate of anionic polymerization, restrain the side reaction, and make the anionic polymerization possible to be conducted at room or even higher temperature.The molar ratio of initiator ligand compound to initiator is from 0.01:1 to 20:1. Compared with present technologies, the method of this invention can control and adjust the homopolymerization and copolymerization rate, side reactions and the polymerization temperature, and make it possible to industrialize.
摘要:
It is to provide a process for synthesizing an intended fluorine-containing compound having a geminal difluoro structure with a high yield, by subjecting a carbonyl compound which is readily available to a two-stage reaction.A compound (1) such as ethyl 4-oxocyclohexanecarboxylate is reacted with a compound of the formula X-Z or a compound of the formula Z2O (wherein Z is a monovalent group which gives a leaving group of the structure —OZ, and X is a chlorine atom, a bromine atom or an iodine atom) such as phosphorus pentachloride, and then a fluorinating agent which generates fluorine anions such as HF is acted thereon to obtain a fluorine-containing compound (2) such as ethyl 4,4-difluorocyclohexanecarboxylate
摘要翻译:通过使容易获得的羰基化合物进行两步反应来提供通过高收率合成具有偕二氟结构的目标含氟化合物的方法。 使化合物(1)如4-氧代环己烷羧酸乙酯与式XZ化合物或式Z 2 O 2化合物(其中Z是一价基团,使得 结构-OZ,X是氯原子,溴原子或碘原子)如五氯化磷,然后将产生氟等阴离子的氟化物如HF用作获得含氟化合物(2),例如 作为4,4-二氟环己烷羧酸乙酯