Arthropodicidal tetrahydrobenzopyranopyrazoles.

摘要

This invention concerns substituted tetrahydrobenzopyranopyrazoles of the formula <CHEM> wherein R1 to R5 are substituents, or R1, R2 and R5 may independently be hydrogen; intermediates thereto, agricultural compositions containing the tetrahydrobenzopyranopyrazoles and a method for using them to control arthropods in agronomic and nonagronomic environments. Also disclosed is a process for preparing the tetrahydrobenzopyranopyrazoles by cyclization of phosphorus-containing starting reactants in the presence of a halogenating agent and base.