| 摘要 |
2,2-Dimethyl-3-(2-bromo-2-phenyl-vinyl)-cyclopropanecarboxylic acid 3-phenoxybenzyl ester of the formula <IMAGE> which possess arthropodicidal properties. In addition, the new intermediate of the formula <IMAGE> is produced by reacting an alpha -bromo-benzyl-phosphonic acid ester of the formula <IMAGE> in which R6 each independently is alkyl or phenyl, or the two radicals R6 together are alkanediyl, with a 3-formyl-2,2-dimethyl-cyclopropanecarboxylic acid ester and saponifying. Also the compounds of the formula <IMAGE> which are new when R1 is not alkyl, are produced by reacting triphenylphosphine and bromine to form dibromo-triphenylphosphorane, and reacting the dibromo-triphenylphosphorane without isolation with an alpha -hydroxy-benzyl-phosphonic acid ester of the formula <IMAGE> |
