BR9801060A - Processo para preparar oxadiazolonas substituìdas. - Google Patents
Processo para preparar oxadiazolonas substituìdas.Info
- Publication number
- BR9801060A BR9801060A BR9801060-3A BR9801060A BR9801060A BR 9801060 A BR9801060 A BR 9801060A BR 9801060 A BR9801060 A BR 9801060A BR 9801060 A BR9801060 A BR 9801060A
- Authority
- BR
- Brazil
- Prior art keywords
- reacted
- temperatures
- general formula
- oxadiazolones
- substituted
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D271/00—Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms
- C07D271/02—Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms not condensed with other rings
- C07D271/10—1,3,4-Oxadiazoles; Hydrogenated 1,3,4-oxadiazoles
- C07D271/113—1,3,4-Oxadiazoles; Hydrogenated 1,3,4-oxadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C241/00—Preparation of compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
- C07C241/04—Preparation of hydrazides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Patente de Invenção:<B>"PROCESSO PARA PREPARAR OXIDIAZOLONAS SUBSTITUìDAS"<D>. Oxadiazolonas substituídas da fórmula (I) em que R representa alquila opcionalmente substituída [ que são conhecidas como intermediários para a preparação de certos herbicidas] são obtidas com bons rendimentos e alto grau de pureza quando em uma primeira etapa ácidos carboxílicos da fórmula geral (II) R-COOH são reagidos com hidrato de hidrazina na presença de um catalisador e, caso apropriado, na presença de um diluente inerte a temperaturas entre 0° e 150°C com eliminação de água, e as hidrazidas carboxílicas resultantes de fórmula geral (III) R-CO-NH-NH~ 2~ são reagidas em uma segunda etapa no mesmo meio de reação - isto é sem isolamento do intermediário- com fosgênio (COCl~ 2~) a temperaturas entre 20°C e 120°C.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/842,585 US5756752A (en) | 1997-04-15 | 1997-04-15 | Process for preparing substituted oxadiazolones |
Publications (2)
Publication Number | Publication Date |
---|---|
BR9801060A true BR9801060A (pt) | 2000-02-08 |
BR9801060B1 BR9801060B1 (pt) | 2009-05-05 |
Family
ID=25287717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI9801060-3A BR9801060B1 (pt) | 1997-04-15 | 1998-04-14 | processo para preparar oxadiazolonas substituìdas. |
Country Status (5)
Country | Link |
---|---|
US (1) | US5756752A (pt) |
EP (1) | EP0872480B1 (pt) |
BR (1) | BR9801060B1 (pt) |
CA (1) | CA2234518C (pt) |
DE (1) | DE59801486D1 (pt) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19853863C1 (de) * | 1998-11-23 | 2000-03-16 | Bayer Ag | Verfahren zur Herstellung von Oxadiazolonen |
KR101273895B1 (ko) | 2011-07-28 | 2013-06-17 | 케이에스랩(주) | 아미노-트리아졸리논의 제조방법 |
CN104803935B (zh) * | 2015-04-22 | 2019-04-12 | 安徽扬子化工有限公司 | 一种以卤代甲酸酯合成吡蚜酮中间体噁二唑酮的方法 |
CN108707121B (zh) * | 2018-08-03 | 2020-09-15 | 北京怡力生物科技有限公司 | 一种制备3-异丙基-4-氨基-1,2,4-三唑啉-5-酮的方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1396615A (en) * | 1973-01-04 | 1975-06-04 | British Titan Ltd | Condensation process |
DE3323283A1 (de) * | 1983-06-28 | 1985-01-10 | Bayer Ag, 5090 Leverkusen | Herstellung von 2-aryl-4-acyl-1,3,4-oxdiazolonen |
DK570987A (da) * | 1986-12-01 | 1988-06-02 | Hoffmann La Roche | Oxadiazol-, thiadiazol- og triazolforbindelser |
FR2618779B1 (fr) * | 1987-07-31 | 1991-01-04 | Poudres & Explosifs Ste Nale | Nouveau procede de preparation des 1,2,4-triazol-3-ones |
DE3827264A1 (de) * | 1987-12-22 | 1989-07-13 | Bayer Ag | Verfahren zur herstellung von 4-amino-1,2,4-triazol-5-onen |
DK0653419T3 (da) * | 1993-11-11 | 1997-10-13 | Shell Int Research | Fremstilling af pivaloylhydrazid |
-
1997
- 1997-04-15 US US08/842,585 patent/US5756752A/en not_active Expired - Lifetime
-
1998
- 1998-04-09 CA CA002234518A patent/CA2234518C/en not_active Expired - Lifetime
- 1998-04-14 DE DE59801486T patent/DE59801486D1/de not_active Expired - Lifetime
- 1998-04-14 BR BRPI9801060-3A patent/BR9801060B1/pt not_active IP Right Cessation
- 1998-04-14 EP EP98106760A patent/EP0872480B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0872480A1 (de) | 1998-10-21 |
EP0872480B1 (de) | 2001-09-19 |
US5756752A (en) | 1998-05-26 |
CA2234518A1 (en) | 1998-10-15 |
DE59801486D1 (de) | 2001-10-25 |
BR9801060B1 (pt) | 2009-05-05 |
MX9802919A (es) | 1998-12-31 |
CA2234518C (en) | 2006-10-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BR0010565A (pt) | Sìntese seletiva direta de para-xileno | |
CO5720995A2 (es) | Compuesto novedoso | |
AU2001242556A1 (en) | Multiple induction energy-driven engine | |
MX221930B (es) | Procedimiento para la obtencion de derivados de trizolintiona. | |
AU562802B2 (en) | Preparation of phosphorus-containing cyanohydrins | |
BR9801060A (pt) | Processo para preparar oxadiazolonas substituìdas. | |
AU578169B2 (en) | N-alkylation of dihydrolysergic acid | |
AU1998701A (en) | Process for the preparation of ketimines | |
ES2118993T3 (es) | Procedimiento para la preparacion de derivados de sulfonilurea. | |
TW200514556A (en) | Synthesis and purification of nateglinide | |
LV12185A (lv) | 4-halogen-2'-nitrobutirofenona iegusanas panemiens | |
BR0006978A (pt) | Processo para preparação de 1,5-diaril-3-pirazóis substituìdos | |
BR0312773A (pt) | Método para produzir um composto altamente puro | |
AR016040A1 (es) | Procedimiento para la preparacion de r- o bien s-norbenzomorfanos | |
WO2003010144A3 (en) | A process for synthesis of fluoroquinolonic derivatives | |
AU2408595A (en) | Process for producing isomer mixtures from o-phenoxyalkylhydroxyl amines or o-phenoxyalkyloximes | |
NO20004918D0 (no) | FremgangsmÕte for fremstilling av benzotiofenkarboksylsyreamidderivater | |
DE60218774D1 (de) | Verfahren zur Herstellung von N,N-carbonyl diimidazol | |
EP1632495A3 (de) | Methyllithium/Lithiumbromid enthaltendes Synthesemittel und Verfahren zu dessen Herstellung | |
RU94023596A (ru) | Способ получения 2-(4-этилбензоил)-бензойной кислоты | |
BR9713950A (pt) | Processo para produção de um composto, e composto. | |
DE69815906D1 (de) | Verfahren zur Herstellung von Chloroacetylaminothiazoleaceticsäure Derivate | |
ATE243189T1 (de) | Methylbiphenyl-derivate, verfahren zu ihrer herstellung und ihre verwendung | |
TH21261A (th) | "กระบวนการสำหรับเตรียม ( 1-ไฮดรอกซีไซโคลเฮกเซน) อาซีโตไนตริล" |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
B06A | Patent application procedure suspended [chapter 6.1 patent gazette] | ||
B06A | Patent application procedure suspended [chapter 6.1 patent gazette] | ||
B09A | Decision: intention to grant [chapter 9.1 patent gazette] | ||
B16A | Patent or certificate of addition of invention granted [chapter 16.1 patent gazette] |
Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 28/07/2009, OBSERVADAS AS CONDICOES LEGAIS. |
|
B25A | Requested transfer of rights approved |
Free format text: TRANSFERIDO DE: BAYER AKTIENGESELLSCHAFT E BAYER CORPORATION |
|
B21A | Patent or certificate of addition expired [chapter 21.1 patent gazette] |
Free format text: PATENTE EXTINTA EM 28.07.2019 |