ETHYNYLBENZOTHIENYLS Russian patent published in 1997 - IPC

FIELD: organic chemistry. SUBSTANCE: products: ethynylbenzothiophenes acting as pesticides of the formula where: R is taken from ; R1 means hydrogen, halogen, lower alkyl, lower haloidalkyl and phenylethynyl; R2 means halogen, lower alkenyl, lower alkylthio-group, lower haloidalkenyl, haloidalkenylthio-group, lower alkoxycarbonyl, lower alkenyl-group, phenyl, 2-thienyl and methylthiene-2-yl; R3 means alkyl, lower trialkylsilyl, lower haloidalkyl, hydroxyalkyl, alkylcarbonyl, methylthiene-2-yl, 2-thienyl and benzothiene-2-yl; R4 means hydrogen, halogen, lower alkyl, lower haloidalkyl; lower alkoxy-group, lower haloidalkylthio-group, lower alkoxycarbonyl, amino-group and alkylcarbonylamino-group. EFFECT: improved method of synthesis. 6 cl, 6 tbl