In a process for effecting reductive amination by reacting a carbonyl compound with a secondary amine and hydrogen, the reaction is carried out as a continuous operation and the reaction mixture comprising the carbonyl compound, the secondary amine and hydrogen is contacted first with an acidic fixed bed and then with a fixed bed of hydrogenation catalyst (hereinafter referred to as a hydrogenation fixed bed).
METHOD FOR PRODUCING RING-HALOGENATED N,N-DIALKYLBENZYLAMINES
申请人:Hartwig Jordan
公开号:US20140221691A1
公开(公告)日:2014-08-07
The invention relates to a method for preparing ring-halogenated N,N-dialkylbenzylamines and intermediates obtainable therefrom for preparing agrochemicals and pharmaceutically active ingredients.
该发明涉及一种制备环卤代N,N-二烷基苄胺和可用于制备农药和药用活性成分的中间体的方法。
US9040751B2
申请人:——
公开号:US9040751B2
公开(公告)日:2015-05-26
DTBB-catalysed lithiation of chlorinated benzylic chlorides, alcohols, thiols or amines
作者:Cecilia Gómez、Fernando F Huerta、Miguel Yus
DOI:10.1016/s0040-4020(97)10402-1
日期:1998.2
presence of different electrophiles [PriCHO, ButCHO, Et2CO, (CH2)5CO, PhCOMe, Me3SiCl] in THF at −50°C followed by hydrolysis with water leads to the corresponding compounds 2. When the same DTBB-catalysedlithiation is applied to several chlorinated benzylic alcohols or mercaptans (4 or 5) it is necessary to deprotonate the starting material with BunLi; treatment of the resulting anions or amine 6 as