申请人:National Research Development Corporation
公开号:US04024163A1
公开(公告)日:1977-05-17
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, lower alkyl (which is different to R.sup.2 when R.sup.2 represents a lower alkyl group) or carbo(loweralkoxy) group which contains at least 2 carbon atoms in the lower alkoxy residue when R.sup.2 represents methyl or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached represent a cycloalkylene ring having at least one endocyclic carbon to carbon double bond; with the proviso that (a) R.sup.2 and R.sup.3 each represent hydrogen only when R.sup.1 represents methyl and (b) R.sup.3 contains at least 2 carbon atoms when R.sup.1 and R.sup.2 each represent hydrogen; and R represents a group which form 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 代表氢或卤素或较低烷基基团;R.sup.3 代表氢或卤素、较低烷基(当 R.sup.2 代表较低烷基基团时与 R.sup.2 不同)或含有至少 2 个碳原子的羟基(当 R.sup.2 代表甲基或 R.sup.2 和 R.sup.3 与它们连接的碳原子一起代表至少有一个内环碳与碳双键的环烷基环时);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,以及 (b) 当 R.sup.1 和 R.sup.2 各自代表氢时,R.sup.3 含有至少 2 个碳原子;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传统形成酯键或使用 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维特格反应,或通过随后转化为所需残基的烷基基团来制备。