申请人:API CORPORATION
公开号:US20210078940A1
公开(公告)日:2021-03-18
The present invention provides a method for industrially producing a highly pure aromatic nitrile compound and a highly pure aromatic carboxylic acid compound safely and highly efficiently at low costs. Compound (2) is subjected to Willgerodt reaction in the presence of an additive as necessary, and the obtained amide compound (3) is hydrolyzed and neutralized to give carboxylic acid compound (4). Carboxylic acid compound (4) is reacted with a halogenating agent in the presence of a catalyst as necessary in an organic solvent, and further reacted with an amidating agent, and the obtained amide compound (5) or (6) is reacted with a dehydrating agent to give nitrile compound (1). Alternatively, carboxylic acid compound (4) is reacted with a halogenating agent and a compound represented by the formula R
6
SO
2
R
7
in the presence of a catalyst as necessary in an organic solvent to give nitrile compound (1). Np is a naphthyl group optionally having substituent(s), R
5
is an alkylene group having 1-3 carbon atoms, and other symbols are as described in the DESCRIPTION.
本发明提供了一种低成本、高纯度、安全高效地工业生产高纯度芳香基腈化合物和高纯度芳香基羧酸化合物的方法。化合物(2)在必要的添加剂存在下经过威尔格罗德反应,得到酰胺化合物(3),然后将酰胺化合物(3)水解并中和,得到羧酸化合物(4)。在有机溶剂中,羧酸化合物(4)在必要的催化剂存在下与卤代试剂反应,进一步与酰胺化试剂反应,得到酰胺化合物(5)或(6),然后与脱水试剂反应,得到腈化合物(1)。或者,羧酸化合物(4)在必要的催化剂存在下与卤代试剂和式为R6SO2R7的化合物反应,得到腈化合物(1)。其中,Np是一个萘基,可选地具有取代基,R5是一个具有1-3个碳原子的烷基,其他符号如描述中所述。