Process for the reductive amination and selective hydrogenation of substrates containing a selected halogen
申请人:Taminco BVBA
公开号:US10167248B2
公开(公告)日:2019-01-01
Disclosed is a process for performing a chemical reaction selected from reductive amination and hydrogenation of a first functional group in an organic feed substrate, which feed substrate comprises at least one further functional group containing a halogen atom, wherein the halogen atom is selected from the list consisting of chlorine, bromine, iodine, and combinations thereof, in the presence of hydrogen and a heterogeneous catalyst comprising at least one metal from the list of Pd, Rh, and Ru, together with at least a second metal from the list consisting of Ag, Ni, Co, Sn, Cu and Au. The process is preferably applied for the reductive amination of 2-chloro-benzaldehyde to form 2-chloro-benzyldimethylamine, as an intermediate in the production of agrochemically active compounds and microbiocides of the methoximinophenylglyoxylic ester series. Further disclosed is a composition rich in 2-chloro-benzyldimethylamine, further comprising an amount of 2-chloro-benzyl alcohol and being low in chlorotoluene isomers.
本发明公开了一种在氢气和异相催化剂(包括至少一种 Pd、Rh 和 Ru 金属,以及至少一种 Ag、Ni、Co、Sn、Cu 和 Au 金属)存在下,对有机原料基质中的第一官能团进行还原胺化和氢化的化学反应的工艺,该有机原料基质包括至少一个含有卤素原子的官能团,其中卤素原子选自氯、溴、碘及其组合。该工艺优选用于 2-氯苯甲醛的还原胺化,生成 2-氯-苄基二甲胺,作为生产甲氧基亚氨基苯乙酸酯系列农用化学活性化合物和杀微生物剂的中间体。此外,还公开了一种富含 2-氯-苄基二甲胺的组合物,该组合物还包含一定量的 2-氯-苄醇,且氯甲苯异构体含量较低。