申请人:Daikin Industries, Ltd.
公开号:EP3643694A1
公开(公告)日:2020-04-29
An object of the present invention is to provide a method for easily and efficiently producing a butadiene compound. The object can be achieved by a method for producing a compound represented by formula (1):
wherein R1a, R1b, R2a, R2b, R3a, and R3b are the same or different, and each represent a hydrogen atom, a fluorine atom, an alkyl group, a fluoroalkyl group, or an aryl group;
provided that at least one of R1a, R1b, R2a, R2b, R3a, and R3b represents a fluorine atom or a fluoroalkyl group; or
one or more moieties among a R1a-C-R2a moiety, a R1b-C-R2b moiety, a R1a-C=C-R3a moiety, and a R1b-C=C-R3b moiety are the same or different, and each may form a non-aromatic carbon ring that may be substituted with one or more fluorine atoms; and
each single bond expressed by a wavy line shows that the configuration with respect to a double bond to which the single bond is bonded is E configuration, Z configuration, or a mixture thereof at any ratio;
the method comprising step A of subjecting a compound represented by formula (2a):
wherein Xa represents a chlorine atom, a bromine atom, or an iodine atom, and the other symbols are as defined above, and a compound represented by formula (2b):
wherein Xb represents a chlorine atom, a bromine atom, or an iodine atom, and the other symbols are as defined above, to a coupling reaction in the presence of (1) a metal catalyst and (2) one or more reducing agents selected from the group consisting of (a) transition metal elements in the 4th period, (b) metal elements in group 12, (c) metal elements in group 13, (d) organic reducing agents, and (e) carbon monoxide.
本发明的目的是提供一种简便高效地生产丁二烯化合物的方法。本发明的目的可以通过生产由式(1)表示的化合物的方法来实现:
其中 R1a、R1b、R2a、R2b、R3a 和 R3b 相同或不同,且各自代表氢原子、氟原子、烷基、氟烷基或芳基;
条件是 R1a、R1b、R2a、R2b、R3a 和 R3b 中至少有一个代表氟原子或氟烷基;或
R1a-C-R2a 基团、R1b-C-R2b 基团、R1a-C=C-R3a 基团和 R1b-C=C-R3b 基团中的一个或多个基团相同或不同,每个基团可形成一个可被一个或多个氟原子取代的非芳香族碳环;以及
用波浪线表示的每个单键表明,相对于与该单键成键的双键的构型是 E 型构型、Z 型构型或其任意比例的混合物;
该方法包括步骤 A:将式(2a)代表的化合物:
其中 Xa 代表氯原子、溴原子或碘原子,其他符号如上定义,以及式 (2b) 所代表的化合物:
其中 Xb 代表氯原子、溴原子或碘原子,其他符号如上所定义,在 (1) 金属催化剂和 (2) 选自 (a) 第 4 周期过渡金属元素、(b) 第 12 族金属元素、(c) 第 13 族金属元素、(d) 有机还原剂和 (e) 一氧化碳组成的组中的一种或多种还原剂存在下进行偶联反应。