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Phoxim is a significant insecticide, and its current synthesis method has some shortcomings such as the high risk of explosion and the  trans  structure (main impurity) is hard to control. Our work solved the above disadvantages by introducing macromolecular alcohol (benzyl alcohol, etc.) as the starting material and optimizing the intermediate reaction conditions. Compared with the current synthesis route, the synthetic method has the following advantages: (1) intermediate benzyl nitrite has a high boiling point and strong safety; (2) intermediate  α -cyanobenzaldehyde oxime sodium are almost (≥99%)  cis  structure, and no further refinement was required, which greatly reduced the amount of waste water produced; and (3) The high yield of phoxim was maintained at 72.9%.

A green method for the preparation of phoxim based on high-boiling nitrite