A simple method has been developed for the reductive deoxygenation of aromatic ketones and benzylic alcohols in the presence of polymethylhydrosiloxane (PMHS). The reductive deoxygenation of aromatic ketones and benzylic alcohols, including secondary alcohols, to the corresponding methylene hydrocarbons has been achieved in good to excellent yields using palladium chloride (PdCl2) as catalyst and PMHS
Provided is a method for producing a biphenyl derivative, with an industrially high yield and excellent productivity, by use of a raw material which is low in cost and toxicity. More specifically, the method for producing the biphenyl derivative represented by general formula (1) is characterized in that a chlorine atom in a benzene derivative represented by general formula (2) reacts with magnesium metal to convert the benzene derivative into a Grignard reagent, and then the Grignard reagent is subjected to a coupling reaction in the presence of a catalyst and a dichloropropane:
and (wherein A represents at least one selected from alkyl groups, alkoxy groups, alkoxymethyl groups, a vinyl group, phenyl groups and chlorine, and n represents an integer of 1 to 4).
本发明提供了一种利用低成本、低毒性的原材料生产联苯衍生物的方法,该方法具有工业高产率和出色的生产率。更具体地说,通式(1)代表的联苯衍生物的生产方法的特点是:通式(2)代表的苯衍生物中的氯原子与金属镁反应,将苯衍生物转化成格氏试剂,然后格氏试剂在催化剂和二氯丙烷存在下进行偶联反应:
和(其中 A 代表至少一个选自烷基、烷氧基、烷氧基甲基、乙烯基、苯基和氯的基团,n 代表 1 至 4 的整数)。
HALOGEN-SUBSTITUTED HETEROCYCLIC COMPOUND
申请人:UBE Industries, Ltd.
公开号:EP2940013A1
公开(公告)日:2015-11-04
A novel α-halogen-substituted thiophene compound or a pharmacologically acceptable salt thereof, which has a potent LPA receptor-antagonist activity and is useful as a medicament is provided.
A compound represented by the general formula (I) wherein A represents, a phenyl ring, a thiophene ring, or an isothiazole ring; R1 is the same or different, and represents a halogen atom, or a C1-C3 alkyl group; R2 represents a hydrogen atom, or a C1-C6 alkyl group; p represents an integer of 0 to 5; V represents CR3 wherein R3 represents a hydrogen atom, an amino group, a nitro group, or a C1-C3 alkoxy group, or V represents a nitrogen atom; and X represents a halogen atom, or a salt thereof.