A process for preparing an optically active biaryl compound the formula (4):
1
wherein R*, R
2
, R
3
, n
1
, n
2
and * are as defined hereinafter, which comprises reacting an aromatic sulfonic acid ester compound of the formula (1):
2
wherein
R
1
is a substituted or unsubstituted alkyl or aryl group,
R
2
is the same or different and represents a fluorine atom, a cyano group, a nitro group, a substituted or unsubstituted linear or branched alkyl group, etc.,
R* is the same or different and represents a substituent having at least one asymmetric carbon, or
the substituents on the adjacent carbon atoms of the benzene ring may be bound each other and taken together with the benzene ring to form a fused polycyclic aromatic ring, and provided that R
1
is not a trifluoromethyl group, a nonafluorobutyl group or a pentafluorophenyl group, with an organic boron compound of the formula (2):
3
wherein
R
3
is a substituted or unsubstituted aryl or heteroaryl group, and
Q
1
and Q
2
are the same or different and each is a hydroxyl group, an alkoxy group having 1 to 4 carbon atoms, etc., at 70° C. or below in the presence of a nickel catalyst and a base.
一种制备光学活性双芳基化合物的方法,其
化学式为(4):1,其中R*,R2,R3,n1,n2和*的定义如下,包括将
化学式(1)的芳香
磺酸酯化合物与
化学式(2)的有机
硼化合物在
镍催化剂和碱存在下,在70°C以下反应,其中:
化学式(1)中,R1为取代或未取代的烷基或芳基基团,R2相同或不同,表示
氟原子、
氰基、硝基、取代或未取代的直链或支链烷基等;R*相同或不同,表示具有至少一个不对称碳的取代基,或相邻苯环碳原子上的取代基可以彼此结合并与苯环一起形成螺环多环芳香环。但R1不是三
氟甲基基团、九
氟丁基基团或
五氟苯基团;
化学式(2)中,R3为取代或未取代的芳基或杂环芳基团,Q1和Q2相同或不同,分别为羟基、具有1到4个碳原子的烷氧基等。