PROCESS FOR PREPARING AN ALKENYL OR ALKYNYL ESTER OF AN ALFA, ALFA DIG SUBSTITUTED PHENYLACACIC ACID WITH SYNERGISTIC INSECTICIDE ACTION.

摘要

1339635 Phenyl acetic acid derivatives SUMITOMO CHEMICAL CO Ltd 16 Dec 1971 [29 Dec 1970] 58483/71 Heading C2C The invention comprises compounds of the formula wherein R 4 is halogen or C 1-4 alkyl, and when more than one of R 4 is present, two such groups may together represent methylenedioxy, n is 0-5, R 1 is C 1-6 alkyl, C 2-6 alkenyl, C 3-6 alkynyl, C 3-6 cycloalkyl, benzyl, thienyl or a group of the formula R 2 is C 1-6 alkyl, C 3-6 alkenyl or C 3-6 alkynyl, and A is a group of the formula -COOR 3 or -CH 2 - OR3 where R 3 is C 1-6 alkyl, C 3-6 alkenyl or C 3-6 alkynyl, provided that (1) R 2 is C 3-6 alkynyl when R 3 is C 1-6 alkyl, (2) R 1 is other than thienyl or a group of Formula II when A is CH 2 OR 3 , (3) R 3 is C 4-6 alkenyl or C 4-6 alkynyl when R 1 is a group of Formula II and A is COOR 3 , and (4) R 1 is other than C 1-6 alkyl when A is COOR 3 , wherein R 3 is specifically C 1-6 alkyl. The compounds are prepared by reacting a compound of the formula where X is halogen, hydroxy or OR 2 and Y is CH 2 OH, CH 2 hal, CH 2 OR 3 , COOR 3 or COOH or a reactive derivative thereof, where hal is halogen, with a compound of the formula R 5 Z where Z is hydroxy or halogen and R 5 is R 2 or R 3 , or a reactive derivative thereof. The compounds are used as synergists in insecticidal compositions.