Thiophenes, Pyrazolothiophenes and Pyrimidinothiophenes as Pesticides | Zendy

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Thiophenes, Pyrazolothiophenes and Pyrimidinothiophenes as Pesticides

Author(s) -

Ram Vishnu Ji

Publication year - 1979

Publication title -

archiv der pharmazie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.468

H-Index - 61

eISSN - 1521-4184

pISSN - 0365-6233

DOI - 10.1002/ardp.19793120903

Subject(s) - chemistry , pesticide , pyrazolone , organic chemistry , stereochemistry , medicinal chemistry , agronomy , biology

Several derivatives of 2‐amino‐3‐ethoxycarbonylthiophenes are prepared, of which 3,6 and 8 act as a precursor for syntheses of the pyrazolothiophenes 5,7 and 9 . The structures of these compounds are confirmed by spectral studies and the indirect synthesis of 10c by diazotisation of 1c and coupling with 1‐phenyl‐3‐methyl‐5‐pyrazolone. The condensation of 1 with 3 H ‐methyl‐5‐nitro‐6‐chlorouracil gave 2a, b, c . Reaction of 1c with various acid chlorides and of 1b, c with methyl/phenylisothiocyanate yielded 11c and 12b, c respectively.

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