Process for the preparation of pyrazolone derivatives
Abstract
Abstract A PROCESS FOR THE PREPARATION OF PYRAZOLONE DERIVATIVES REPRESENTED BY THE FOLLOWING FORMULA 1-(A-O-CH(-R)-CO-NH-),3-((1-B,5-(O=)-2-PYRAZOLIN-3-YL)- NH-CO-)BENZENE WHEREIN R REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF A HYDROGEN ATOM OR AN ALKYL GROUP HAVING 1-6 CARBON ATOMS, A REPRESENTS R1,R2-PHENYL WHEREIN R1 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF A HYDROGEN ATOM OR AN ALKYL GROUP AND R2 IS AN ALKYL GROUP, AND B REPRESENTS (X)M-PHENYL WHEREIN X, WHICH MAY BE THE SAME OR DIFFERENT, REPRESENTS AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A HYDROGEN ATOM, AN ALKYL GROUP, AN ALKOXY GROUP, AN ARYL GROUP, AN ARLOXYL GROUP, A CYANO GROUP, OR A HALOGEN ATOM AND M IS 1-5, WHICH COMPRISES CONDENSING, IN ACETONITRILE, A COMPOUND REPRESENTED BY THE GENERAL FORMULA 1-(A-O-CH(-R)-CO-NH-),3-(CL-CO-)BENZENE WHEREIN A ARE R HAVE THE SAME MEANINGS AS DEFINED ABOVE, WITH A COMPOUND REPRESENTED BY THE GENERAL FORMULA 1-B,3-NH2-2-PYRAZOLIN-5-ONE WHEREIN B HAS THE SAME MEANING AS DEFINED ABOVE.
Inventors
- 👤 T Takahashi
- 👤 H Sato
- 👤 D Nishio
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |