Synthesis of fluoromethyl, difluoromethyl and trifluoromethyl analogues of pyrazosulfuron‐ethyl as herbicides | Zendy

Morimoto Katsushi | Zendy; Makino Kenzi | Zendy; Yamamoto Susumu | Zendy; Sakata Gozyo | Zendy

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Synthesis of fluoromethyl, difluoromethyl and trifluoromethyl analogues of pyrazosulfuron‐ethyl as herbicides

Author(s) -

Morimoto Katsushi,

Makino Kenzi,

Yamamoto Susumu,

Sakata Gozyo

Publication year - 1990

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570270360

Subject(s) - chemistry , trifluoromethyl , carboxylate , difluorocarbene , pyrazole , medicinal chemistry , organic chemistry , alkyl

Ethyl 1‐fluoromethyl‐5‐(4,6‐dimethoxypyrimidin‐2‐ylcarbamoylsulfamoyl)pyrazole‐4‐carboxylate 1b , a new fluoromethyl analogue of the herbicide pyrazosulfuron‐ethyl la, was prepared from ethyl 1‐fluoromethylpyrazole‐4‐carboxylate 4b . The difluoromethyl and trifluoromethyl analogues 1c,d were also synthesized from ethyl pyrazole‐4‐carboxylate 2 via difluorocarbene reaction.

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