申请人:National Research Development Corporation
公开号:US04464391A1
公开(公告)日:1984-08-07
New insecticides are of formula: ##STR1## wherein R.sup.1 represents hydrogen or a methyl group; R.sup.2 represents hydrogen or a halogeno or lower alkyl group; R.sup.3 represents hydrogen or a halogeno or carbo(lower alkoxy) group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl, (b) when R.sup.1 and R.sup.3 each represent hydrogen and R.sup.2 represents alkyl, that alkyl group contains at least 2 carbon atoms and (c) when R.sup.3 represents halogeno, R.sup.2 represents hydrogen or halogeno; and R represents a group which forms insecticidal esters with chrysanthemic acid e.g. 5-benzyl-3-furylmethyl, 3-phenoxybenzyl, .alpha.-cyano-3-phenoxybenzyl. The esters are prepared by forming the ester linkage conventionally or by a Wittig reaction using a 3-formyl- or 3-acetyl-2,2-dimethyl cyclopropane carboxylic acid esterified with the desired residue or by an alkyl group which is subsequently converted to the desired residue.
新杀虫剂的化学式为:##STR1## 其中,R.sup.1代表氢或甲基基团;R.sup.2代表氢或卤素或低碳基团;R.sup.3代表氢或卤素或含有至少2个碳原子的碳基(低碳氧基)基团,当R.sup.2代表甲基时,碳氧基残基中至少含有2个碳原子;但条件是(a) 当R.sup.1代表甲基时,R.sup.2和R.sup.3各自仅代表氢,(b) 当R.sup.1和R.sup.3各自代表氢且R.sup.2代表烷基时,该烷基含有至少2个碳原子,(c) 当R.sup.3代表卤素时,R.sup.2代表氢或卤素;R代表一种与菊酯酸形成杀虫酯的基团,例如5-苄基-3-呋喃甲基、3-苯氧基苄基、α-氰基-3-苯氧基苄基。这些酯类化合物可通过常规形成酯键或使用3-甲醛基或3-乙酰基-2,2-二甲基环丙烷羧酸酯化所需残基的Wittig反应制备,或通过随后转化为所需残基的烷基基团制备。