专利号:US-2022298136-A1 优先权日:2019-08-21 标题 :Process for synthesis of pyrazolidinone compounds 发明人:MATHUR SUCHET SARAN; JAIN NANDKUMAR JANARDAN; MORE MAHENDRA MAHIPAT 权利人:GHARDA CHEMICALS LTD 摘要:A process for the synthesis of pyrazolidinone, particularly alkyl 2-(3-chloropyridin-2-yl)-5-oxo-pyrazolidine-3-carboxylate (pyrazolidinone) compound, is provided. The process is simple, economical, and produces alkyl 2-(3-chloropyridin-2-yl)-5-oxo-pyrazolidine-3-carboxylate with a comparatively high yields.
专利号:WO-2021033165-A1 优先权日:2019-08-21 标 题:Process for synthesis of pyrazolidinone compounds 发明人:MATHUR SUCHET SARAN; MHATRE HRIDAYNATH VISHWANATH; PEDHAVI VISHAL PARSHURAM 权利人:GHARDA CHEMICALS LTD 摘要:The present disclosure relates to a process for the synthesis of pyrazolidinone, particularly alkyl 2-(3-chloropyridin-2-yl)-5-oxo-pyrazolidine-3-carboxylate (pyrazolidinone) compound. The process of the present disclosure is simple, economical, and produces alkyl 2-(3-5 chloropyridin-2-yl)-5-oxo-pyrazolidine-3-carboxylate with a comparatively high yields.
专利号:WO-2021033172-A1 优先权日:2019-08-20 标题:Process for the preparation of chlorantraniliprole 发明人:V ASHWIN; PRADHAN ASHOK KUMAR; PALIMKAR SANJAY SAMBHAJIRAO; MANE AVINASH SHESHRAO; KUNHIMON SYAM KUMAR UNNIARAN 权利人:EUROFINS ADVINUS LTD 摘要:The present invention relates to two novel, efficient and one-pot methods for synthesizing chlorantraniliprole. In the first scheme, Chlorantraniliprole is prepared by a novel telescopic process starting from 3-Bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylic acid a key raw material-A (Key RM-A). In the second scheme, starting from Key RM-A, the process steps use of a novel variant of anthranilic acid (Methyl 2-amino-5-chloro-3-methylbenzoate), to get Chlorantraniliprole. Furthermore, the present invention also relates to the synthesis of key starting material for the synthesizing chlorantraniliprole in-situ. All the in-situ steps of the disclosed synthesis methods obtain good yield, without using any expensive reagent or base or harsh reaction conditions, which makes the process simple, environment friendly and more cost effective. With this process the production cost of chlorantraniliprole and its intermediates is substantially reduced; fewer by-products are formed during its synthesis and since it's a one-pot reaction, isolation and purification are easy to achieve.
专利号:WO-2021033166-A1 优先权日:2019-08-21 标 题 :Process for synthesis of pyrazolidinone compounds
专利号:EP-4003962-A1 优先权日:2019-08-21 标题 :Process for synthesis of pyrazolidinone compounds
专利号:CN-108084152-B 优先权日:2017-11-02 标题:A kind of bisamide compound and its synthesis method and application
参考文献:10.1107/s1600536811013432 摘要:Hu ZN, Yang HB, Luo H, Li B. 3-Chloro-pyridin-2-amine. Acta Crystallogr Sect E Struct Rep Online. 2011 May 01;67(Pt 5):o1138.