申请人:Choi Yong-Moon
公开号:US20050080268A1
公开(公告)日:2005-04-14
A process for preparing O-carbamoyl aminoalcohols represented by Formula I
wherein: n is an integer from 0 and 5;
R
1
, R
2
, R
3
and R
4
are individually selected from the group consisting of hydrogen, alkyl, cycloalkyl, substituted or unsubstituted aryl and arylalkyl the aryl portion of which may be unsubstituted or substituted;
R
5
and R
6
are individually selected from the group consisting of hydrogen, alkyl or arylalkyl the aryl portion of which may be unsubstituted or substituted; or
R
1
and R
5
together with the carbon and nitrogen to which they are attached may form an unfused or fused heterocyclic ring having from 4 to 10 members,
comprising reacting an aminoalcohol represented by Formula II
wherein n, R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined;
with a cyanate and an excess of an acid in an organic solvent medium.
一种制备式I的O-氨基醇衍生物的方法,其中:n为0到5的整数;R1、R2、R3和R4分别选自氢、烷基、环烷基、取代或未取代芳基和芳基烷基的群体,其中芳基部分可以未取代或取代;R5和R6分别选自氢、烷基或芳基烷基的群体,其中芳基部分可以未取代或取代;或者R1和R5与它们所连接的碳和氮一起可以形成具有4到10个成员的未融合或融合的杂环环;包括在有机溶剂介质中,用氰酸酯和过量的酸反应式II的氨基醇衍生物,其中n、R1、R2、R3、R4、R5和R6如上所定义。