Insecticidal anthranilic diamides: A new class of potent ryanodine receptor activators
摘要:
A novel class of anthranilic diamides has been discovered with exceptional insecticidal activity on a range of Lepidoptera. These compounds have been found to exhibit their action by release of intracellular Ca2+ stores mediated by the ryanodine receptor. The discovery, synthesis, structure-activity, and biological results are presented. (c) 2005 Elsevier Ltd. All rights reserved.
Process for producing 4-trifluoromethylnicotinic acid
申请人:Ishihara Sangyo Kaisha Ltd.
公开号:US05708175A1
公开(公告)日:1998-01-13
A process for producing 4-trifluoromethylnicotinic acid of the formula (VIII) or its salt: ##STR1## which comprises (i) a first step of reacting a halide of the formula (I): CF.sub.3 COHal (I) wherein Hal is a halogen atom, with a compound of the formula (II): CH.sub.2 .dbd.CHOR.sup.1 (II) wherein R.sup.1 is an alkyl group, in the presence of a base to obtain a 4-alkoxy-1,1,1-trifluoro-3-buten-2-one of the formula (III): CF.sub.3 CO--CH.dbd.CH--OR.sup.1 (III) wherein R.sup.1 is as defined above, and reacting this compound with ammonia to obtain 4-amino-1,1,1-trifluoro-3-buten-2-one of the formula (IV): ##STR2## and (ii) a second step of subjecting the 4-amino-1,1,1-trifluoro-3-buten-2-one obtained in the first step and a compound of the formula (V): ACO.sub.2 R.sup.2 (V) wherein R.sup.2 is an ester-forming residue, and A is (R.sup.3 O)CH.dbd.CH-- or (R.sup.3 O).sub.2 CHCH.sub.2 --, wherein R.sup.3 is an alkyl group, to a condensation reaction to obtain a compound of the formula (VI) (inclusive of its salt): ##STR3## wherein R.sup.2 is as defined above, and/or a compound of the formula (VII) (inclusive of its salt): ##STR4## wherein R.sup.2 and R.sup.3 are as defined above, as the reaction product, and then subjecting the reaction product to ring closure and hydrolysis.
A straightforward preparation of fluorine-containing 1,2-dihydropyrimidines and pyrimidines with 2,2-dihydropolyfluoroalkylaldehydes
作者:Xian-Jin Yang、Li-Si Zhang、Jin-Tao Liu
DOI:10.1016/j.tet.2007.04.010
日期:2007.6
The reactions of 2,2-dihydropolyfluoroalkylaldehydes with ammonia and enol ethers or carbonyl compounds are described. In the presence of zinc chloride, all reactions took place readily in THF at 50 °C to give fluorine-containing 1,2-dihydropyrimidines in moderate to good yields. Dehydrogenation of the resulting fluorine-containing 1,2-dihydropyrimidines with tetrachloro-1,4-benzoquinone (TCBQ) or
Process for the preparation of 4-Haloalkylnicotinonitriles
申请人:——
公开号:US20020087004A1
公开(公告)日:2002-07-04
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.