申请人:——
公开号:US20020028939A1
公开(公告)日:2002-03-07
The process for the preparation of bicyclic amidines of the general formula:
1
wherein A is selected from the group consisting of —CR
1
R
2
—CR
3
R
4
—CR
5
R
6
—, —CR
1
R
2
—CR
3
R
4
—CR
5
R
6
—CR
7
R
8
—and —CR
1
R
2
—CR
3
R
4
—CR
5
R
6
—CR
7
R
8
—CR
9
R
10
—, wherein the substituents in A are in each case numbered starting from the nitrogen atom, and B is selected from the group consisting of —CR
11
R
12
—CR
13
R
14
—, —CR
11
R
12
—CR
15
R
16
CR
13
R
14
— and —CR
11
R
12
—CR
15
R
16
—CR
17
R
18
—CR
13
R
14
—, and R
1
, R
2
and R
11
to R
14
are, in each case independently of one another, hydrogen, C
1
-C
4
-alkyl, aryl, or are C
1
-C
4
-alkyl which is substituted with hydroxyl, amino, C
1
-C
4
-alkylamino or mercapto, and R
3
to R
10
and R
15
to R
18
are, in each case independently of one another, hydrogen, C
1
-C
4
-alkyl, aryl, hydroxyl, amino, C
1
-C
4
-alkylamino or mercapto, or are C
1
-C
4
-alkyl which is substituted with hydroxyl, amino, C
1
-C
4
-alkylamino or mercapto. The process includes heating (reacting) a lactone of the general formula:
2
wherein A is as defined above, to at least 150° C. together with an at least equimolar quantity of an amine of the general formula:
H
2
N—B—NH
2
III
wherein B is as defined above. The resultant reaction mixture is subjected, without isolating an intermediate, to a fractional distillation.
通式为1的双环氨基甲烷的制备过程:其中A选自由CR1R2-CR3R4-CR5R6-、CR1R2-CR3R4-CR5R6-CR7R8-和CR1R2-CR3R4-CR5R6-CR7R8-CR9R10-组成的基团,其中A中的取代基在每种情况下从氮原子开始编号,B选自由CR11R12-CR13R14-、CR11R12-CR15R16-CR13R14-和CR11R12-CR15R16-CR17R18-CR13R14-组成的基团,R1、R2和R11至R14在每种情况下独立地为氢、C1-C4烷基、芳基或被羟基、氨基、C1-C4烷基氨基或巯基取代的C1-C4烷基,R3至R10和R15至R18在每种情况下独立地为氢、C1-C4烷基、芳基、羟基、氨基、C1-C4烷基氨基或巯基,或被羟基、氨基、C1-C4烷基氨基或巯基取代的C1-C4烷基。该过程包括将通式为2的内酯(其中A如上所述)与通式为H2N-B-NH2的胺(其中B如上所述)至少等摩尔量一起加热(反应)至150℃以上。所得反应混合物在不分离中间体的情况下进行分馏。