申请人:Apotex Pharmachem Inc.
公开号:US07884121B2
公开(公告)日:2011-02-08
This invention relates to a process for the preparation of an aminoalkyl phenyl carbamate compound of formula 1,
wherein R1 and R2 independently are hydrogen or C1-6 alkyl; R3 and R4 are the same or different and each is a lower alkyl; or R3 and R4 together with the nitrogen to which they are attached form a cyclic moiety of a three to eight-member ring, with or without a hetero atom like nitrogen or oxygen; R5 and R6 independently are hydrogen, linear, branched or cyclic C1-6 alkyl, allyl, propargyl or benzyl; or R5 and R6 together with the nitrogen to which they are attached form a cyclic moiety of three to eight member ring, with or without a hetero atom like nitrogen or oxygen; the carbon center marked with “*” is racemic or enantiomerically enriched (R)- or (S)-configuration; and pharmaceutically acceptable addition salts, and crystalline and amorphous forms thereof comprising the steps of:
i) converting an amine R5R6NH to a carbamoylimidazolium salt of formula 3
wherein R5 and R6 are as defined above; X− is a counterion and R7 is an alkyl or aryl group;
ii) reacting in a solvent at a controlled reaction temperature the compound of formula 3 with a compound of formula 4,
wherein R1, R2, R3, R4 and “*” are as defined above to give the compound of formula 1; and
iii) isolating the compound of formula 1.
本发明涉及一种制备公式1的氨基烷基苯基氨基甲酸酯化合物的方法,其中R1和R2独立地为氢或C1-6烷基;R3和R4相同或不同,且每个为低级烷基;或R3和R4与它们所连接的氮一起形成三到八元环的环状基团,带有或不带有氮或氧等杂原子;R5和R6独立地为氢、线性、支链或环状的C1-6烷基、烯丙基、丙炔基或苄基;或R5和R6与它们所连接的氮一起形成三到八元环的环状基团,带有或不带有氮或氧等杂原子;标有“*”的碳中心是外消旋的或对映富集的(R)-或(S)-构型;以及药学上可接受的加合盐、晶体和非晶态形式,包括以下步骤:i)将胺R5R6NH转化为公式3的氨基甲酰咪唑盐,其中R5和R6如上定义;X-是计数离子,R7是烷基或芳基基团;ii)在溶剂中以控制的反应温度反应公式3的化合物和公式4的化合物,其中R1、R2、R3、R4和“*”如上定义,以得到公式1的化合物;iii)分离公式1的化合物。