申请人:——
公开号:US20010018405A1
公开(公告)日:2001-08-30
A process for the preparation of compounds having plant protecting, in particular fungicidal properties, of the formula I
1
wherein A is a fused 5-membered heterocyclic ring which may be saturated or unsaturated, aromatic or non-aromatic and which may contain one or two hetero atoms O, S and/or N, or is fused benzo, pyrido or pyridazino; R
1
and R
2
are groups which are inert to the reactions; R
3
is optionally substituted C
1
-C
8
alkyl, C
2
-C
8
alkenyl, C
2
-C
8
alkynyl, C
3
-C
6
cycloalkyl or C
3
-C
6
cycloalkyl-C
1
-C
6
alkyl; and R
4
is optionally substituted C
1
-C
6
alkyl, C
2
-C
6
alkenyl, C
2
-C
6
alkynyl, C
3
-C
6
cycloalkyl or C
3
-C
6
cycloalkyl-C
1
-C
6
alkyl; in which process (a) a compound of the formula II, wherein A, R
1
, R
2
and R
3
are as defined for formula I, is reacted with an orthocarbonate of the formula III, wherein R
4
is as defined for formula I and Y is OR
4
, CN or NO
2
, to give the intermediate compound of formula IV; and subsequently (b) the compound of the formula IV is cyclized to a compound of the formula I
2
一种制备具有植物保护性质,特别是杀真菌性质的化合物的方法,其中化合物的结构式为I1,其中A是融合的5元杂环环,可以是饱和或不饱和,芳香或非芳香,可以含有一个或两个杂原子O,S和/或N,或者是融合的苯并,吡啶或吡嗪环;R1和R2是对反应惰性的基团;R3是可选的取代C1-C8烷基,C2-C8烯基,C2-C8炔基,C3-C6环烷基或C3-C6环烷基-C1-C6烷基;R4是可选的取代C1-C6烷基,C2-C6烯基,C2-C6炔基,C3-C6环烷基或C3-C6环烷基-C1-C6烷基;在该过程中,(a)将式II的化合物与式III的正碳酸酯反应,其中R4如式I所定义,Y为OR4,CN或NO2,以得到式IV的中间体;随后(b)将式IV的化合物环化成为式I2的化合物。