申请人:Raheem Mohammed Abdul
公开号:US20080306280A1
公开(公告)日:2008-12-11
This invention relates to a process for the preparation of an aminoalkyl phenyl carbamate compound of formula 1,
wherein R
1
and R
2
independently are hydrogen or C
1-6
alkyl; R
3
and R
4
are the same or different and each is a lower alkyl; or R
3
and R
4
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; R
5
and R
6
independently are hydrogen, linear, branched or cyclic C
1-6
alkyl, allyl, propargyl or benzyl; or R
5
and R
6
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 R
5
R
6
NH to a carbamoylimidazolium salt of formula 3
wherein R
5
and R
6
are as defined above; X
−
is a counterion and R
7
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 R
1
, R
2
, R
3
, R
4
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式为1的氨基烷基苯基氨酯化合物的方法,其中R1和R2独立地是氢或C1-6烷基;R3和R4相同或不同,每个是较低的烷基;或者R3和R4与它们连接的氮一起形成一个三至八元环的环状结构,带有或不带有类似氮或氧的杂原子;R5和R6独立地是氢、线性、支链或环状的C1-6烷基、烯丙基、丙炔基或苄基;或者R5和R6与它们连接的氮一起形成一个三至八元环的环状结构,带有或不带有类似氮或氧的杂原子;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,以及包括以下步骤的晶体和非晶态形式:i)将胺R5R6NH转化为式3的羧酰咪唑盐,其中R5和R6如上定义;X^-是一个对离子,R7是一个烷基或芳基;ii)在溶剂中在受控反应温度下,将式3的化合物与式4的化合物反应,其中R1、R2、R3、R4和“*”如上定义,以得到式1的化合物;和iii)分离出式1的化合物。