申请人:——
公开号:US20030109711A1
公开(公告)日:2003-06-12
4-Haloalkylnicotinonitriles having the formula (I)
1
which are suitable as intermediates in the preparation of pesticides, are obtained by:
(a) reacting a 3-amino-1-haloalkyl-2-propen-1-one
R
F
—C(O)—CH═CH—NH
2
(II)
in a condensation reaction with a compound of the formula (III) to (VII),
(R
1
Z)CH═CH—CN (III)
(R
1
Z)
2
CH—CH
2
—CN (IV)
Hal-CH═CH—CN (V)
Hal
2
CH—CH
2
CN (VI)
HC≡C—CN (VII),
to give a compound of the formula (VIII), (IX) and/or (X),
R
F
—C(O)—CH═CH—NH—CH═CH—CN (VIII)
R
F
—C(O)—CH═CH—NH—CH(ZR
1
)—CH
2
—CN (IX)
R
F
—C(O)—CH═CH—NH—CH(Hal)-CH
2
—CN (X),
wherein R
F
is (C
1
-C
4
)-haloalkyl, R
1
is alkyl, Hal is Cl or Br and each Z, independently, is O, S, NR
1
or OCO; and
(b) subjecting the reaction product to a ring closure reaction.
具有公式(I)的4-卤代烷基吡啶腈可用作杀虫剂制备中间体,通过以下步骤获得:(a)将3-氨基-1-卤代烷基-2-丙烯-1-酮RF—C(O)—CH═CH—NH2(II)与公式(III)至(VII)的化合物在缩合反应中反应,其中(R1Z)CH═CH—CN (III)(R1Z)2CH—CH2—CN (IV)Hal-CH═CH—CN (V)Hal2CH—CH2CN (VI)HC≡C—CN (VII),以给出公式(VIII),(IX)和/或(X)的化合物,RF—C(O)—CH═CH—NH—CH═CH—CN (VIII)RF—C(O)—CH═CH—NH—CH(ZR1)—CH2—CN (IX)RF—C(O)—CH═CH—NH—CH(Hal)-CH2—CN (X),其中RF是(C1-C4)卤代烷基,R1是烷基,Hal是Cl或Br,每个Z独立地为O,S,NR1或OCO; (b)将反应产物进行环闭反应。