申请人:Vogelbacher Uwe Josef
公开号:US20100105903A1
公开(公告)日:2010-04-29
The present invention relates to a process for preparing β-ketonitriles of the general formula I
in which
R
1
is, inter alia, C
1
-C
12
-alkyl, C
2
-C
12
-alkenyl, C
2
-C
12
-alkinyl, C
3
-C
8
-cycloalkyl, C
3
-C
8
-cycloalkyl-C
1
-C
4
-alkyl, phenyl-C
1
-C
4
-alkyl, phenoxy-C
1
-C
4
-alkyl or benzyloxy-C
1
-C
4
-alkyl;
R
2
is, inter alia, hydrogen, C
1
-C
12
-alkyl, C
2
-C
12
-alkenyl, C
2
-C
12
-alkinyl, C
3
-C
8
-cycloalkyl, C
3
-C
8
-cycloalkyl-C
1
-C
4
-alkyl, phenyl, phenyl-C
1
-C
4
-alkyl, phenoxy-C
1
-C
4
-alkyl or benzyloxy-C
1
-C
4
-alkyl,
which comprises reacting a nitrile of the formula II
in which R
1
has one of the meanings given above with a carboxylic ester of the formula III
in which R
2
has one of the meanings given above and R
3
is C
1
-C
12
-alkyl, C
1
-C
4
-alkoxy-C
1
-C
4
-alkyl, C
3
-C
8
-cycloalkyl, C
3
-C
8
-cycloalkyl-C
1
-C
4
-alkyl, phenyl-C
1
-C
4
-alkyl, phenoxy-C
1
-C
4
-alkyl or benzyloxy-C
1
-C
4
-alkyl,
where the reaction is carried out in the presence of a potassium alkoxide and at least 80% of the nitrile of the formula II are added to the reaction under reaction conditions.
本发明涉及一种制备一般式I的β-酮腈的方法,其中R1是C1-C12-烷基、C2-C12-烯基、C2-C12-炔基、C3-C8-环烷基、C3-C8-环烷基-C1-C4-烷基、苯基-C1-C4-烷基、苯氧基-C1-C4-烷基或苄氧基-C1-C4-烷基;R2是氢、C1-C12-烷基、C2-C12-烯基、C2-C12-炔基、C3-C8-环烷基、C3-C8-环烷基-C1-C4-烷基、苯基、苯基-C1-C4-烷基、苯氧基-C1-C4-烷基或苄氧基-C1-C4-烷基。该方法包括将具有上述给定含义之一的一般式II的腈与具有上述给定含义之一的一般式III的羧酸酯反应,其中R3是C1-C12-烷基、C1-C4-烷氧基-C1-C4-烷基、C3-C8-环烷基、C3-C8-环烷基-C1-C4-烷基、苯基-C1-C4-烷基、苯氧基-C1-C4-烷基或苄氧基-C1-C4-烷基,在存在钾醇和至少80%的一般式II的腈被加入到反应中,并在反应条件下进行。