FR2432020A1 - Procede d'obtention de la 4,5-dichloro-2-phenylpyridazine-3 (2h)-one a partir de la 5-chloro-4-amino-2-phenyl-pyridazine 3(2h)-one - Google Patents

Procede d'obtention de la 4,5-dichloro-2-phenylpyridazine-3 (2h)-one a partir de la 5-chloro-4-amino-2-phenyl-pyridazine 3(2h)-one

Info

Publication number
FR2432020A1
FR2432020A1 FR7917002A FR7917002A FR2432020A1 FR 2432020 A1 FR2432020 A1 FR 2432020A1 FR 7917002 A FR7917002 A FR 7917002A FR 7917002 A FR7917002 A FR 7917002A FR 2432020 A1 FR2432020 A1 FR 2432020A1
Authority
FR
France
Prior art keywords
pca
phenylpyridazine
chloro
amino
iso
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7917002A
Other languages
English (en)
Other versions
FR2432020B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oxon Italia SpA
Original Assignee
Oxon Italia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oxon Italia SpA filed Critical Oxon Italia SpA
Publication of FR2432020A1 publication Critical patent/FR2432020A1/fr
Application granted granted Critical
Publication of FR2432020B1 publication Critical patent/FR2432020B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D237/00—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
    • C07D237/02—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings not condensed with other rings
    • C07D237/06—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
    • C07D237/10—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D237/22—Nitrogen and oxygen atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Plural Heterocyclic Compounds (AREA)

Abstract

Procédé d'obtention de 4,5-dichioro-2-phényl-pyridazine-3(2H)-one (PCC) à partir de 5-chloro-4-amino-2-phénylpyridazine-3(2H)-one (iso-PCA). On part d'iso-PCA qui est un sous-produit de préparation de son isomère PCA (4-chloro-5-amino-2-phénylpyridazine-2-(3H)-one, herbicide actif. On diazote sur le groupe amino par le nitrile de sodium en présence d'HCl concentré à basse température, on dilue pour former un cycle oxadiazole sur le groupe chloro, avec élimination d'HCl, on filtre et on sèche. Puis on traite par le chlorure de thionyle dans le diméthylformamide vers 70-75 degrés C, en sone d'obtenir la 4,5-dichloro-2-phénylpyridazine-3(2H)-one. Par amination ultérieure on obtiendra le << Pyrazon >> technique, mélange des isomères PCA et iso-PCA, que l'on séparera, et l'iso-PCA séparé sera renvoyé en tête. Application à la préparation du PCA herbicide sélectif.
FR7917002A 1978-07-28 1979-06-29 Procede d'obtention de la 4,5-dichloro-2-phenylpyridazine-3 (2h)-one a partir de la 5-chloro-4-amino-2-phenyl-pyridazine 3(2h)-one Granted FR2432020A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT83624/78A IT1107509B (it) 1978-07-28 1978-07-28 Procedimento per ottenere 4,5-dicloro-2-fenil-3(2h)-piridazinone a partire da 5-cloro-4-ammino-2-fenil-3(2h)-piridazinone

Publications (2)

Publication Number Publication Date
FR2432020A1 true FR2432020A1 (fr) 1980-02-22
FR2432020B1 FR2432020B1 (fr) 1984-08-10

Family

ID=11323300

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7917002A Granted FR2432020A1 (fr) 1978-07-28 1979-06-29 Procede d'obtention de la 4,5-dichloro-2-phenylpyridazine-3 (2h)-one a partir de la 5-chloro-4-amino-2-phenyl-pyridazine 3(2h)-one

Country Status (17)

Country Link
US (1) US4237287A (fr)
JP (1) JPS5520787A (fr)
AT (1) AT367413B (fr)
BE (1) BE877936A (fr)
BR (1) BR7904765A (fr)
CA (1) CA1119173A (fr)
CH (1) CH640839A5 (fr)
DK (1) DK146204C (fr)
ES (1) ES482895A1 (fr)
FR (1) FR2432020A1 (fr)
GB (1) GB2027704B (fr)
IL (1) IL57771A (fr)
IT (1) IT1107509B (fr)
NL (1) NL7905411A (fr)
SE (1) SE433077B (fr)
SU (1) SU991946A3 (fr)
YU (1) YU41167B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2937421A1 (de) * 1979-09-15 1981-04-09 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von 4-amino-5-chlor-1-phenylpyridazon-(6)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Néant *

Also Published As

Publication number Publication date
ATA516779A (de) 1981-11-15
IL57771A0 (en) 1979-11-30
FR2432020B1 (fr) 1984-08-10
GB2027704A (en) 1980-02-27
SE433077B (sv) 1984-05-07
YU41167B (en) 1986-12-31
GB2027704B (en) 1982-11-17
ES482895A1 (es) 1980-04-01
DK146204C (da) 1983-12-27
AT367413B (de) 1982-07-12
DK318979A (da) 1980-01-29
SE7906416L (sv) 1980-01-29
JPS5520787A (en) 1980-02-14
JPS6242899B2 (fr) 1987-09-10
CH640839A5 (it) 1984-01-31
US4237287A (en) 1980-12-02
IT7883624A0 (it) 1978-07-28
YU182979A (en) 1983-01-21
CA1119173A (fr) 1982-03-02
BR7904765A (pt) 1980-04-22
IT1107509B (it) 1985-11-25
NL7905411A (nl) 1980-01-30
SU991946A3 (ru) 1983-01-23
BE877936A (fr) 1979-11-16
IL57771A (en) 1983-03-31
DK146204B (da) 1983-07-25

Similar Documents

Publication Publication Date Title
FR2415094A1 (fr) Procede de production de n,n-di(ethyl)-meta-toluamide
DK0555340T3 (da) Fremgangsmåde til fremstilling af florfenicol, analoger heraf og oxazolinmellemprodukter dertil
JPH02131462A (ja) アシルアニリド、その製法及び抗アンドロゲン作用を有する医薬又は獣医薬組成物
FR2375171A1 (fr) Procede de production de methanol
FR2432020A1 (fr) Procede d&#39;obtention de la 4,5-dichloro-2-phenylpyridazine-3 (2h)-one a partir de la 5-chloro-4-amino-2-phenyl-pyridazine 3(2h)-one
Lusskin et al. A New Reaction of Nitriles. V. Preparation of N-(2-Halo-1-ethyl)-amides1
JPS557242A (en) Phenethylamine derivative
FR2375140A1 (fr) Procede pour la fabrication de fluorure d&#39;hydrogene a partir d&#39;une solution aqueuse de fluorure d&#39;hydrogene et d&#39;acide sulfurique
ATE1997T1 (de) Verfahren zur gewinnung der enantiomeren formen von 4-cyan-1-(n-methyl-n-(2&#39;-((3&#39;&#39;,4&#39;&#39;dimethoxyphenyl))-ethyl)-amino)-5-methyl-4(3&#39;,4&#39;,5&#39;-trimethoxyphenyl)-hexan und dessen salzen.
FR2363544A1 (fr) Procede pour l&#39;obtention d&#39;esters alkyliques de l&#39;acide cyanoacetique a substitue
ES8104789A1 (es) Procedimiento para la separacion de leucina, isoleucina y valina
KR870010036A (ko) 유기 아연 착화합물의 제조방법 및 활성 성분으로서 그를 함유하는 약학 조성물
KR830003451A (ko) 식물 생장 조절제로 유용한 2-옥소-3-벤조티아졸린 아세트산으로부터 유래된 이미드아미드
JPS5430156A (en) Synthesis of benzamide derivative
BG33282A3 (en) Method for obtaining of 4- amino- 5- chlorine- 1- phenylpyridazon- (6)
ES322595A1 (es) Procedimiento para la preparacion de cloruros de d,1-1,- y d-carnitinamida.
SU148041A1 (ru) Способ получени 2-хлорнафтохинона-1,4
GB1391305A (en) Phenylalkylamines
FR2377153A1 (fr) Agent de regulation du metabolisme des plantes, contenant comme substance active des esters d&#39;acide sulfoniques
Pinck et al. Preparation and Decomposition of 9-Fluorylchloramines
JPS5427532A (en) Preparation of optical active 2-(substituted phenyl)-3-methyl-butyric acid chloride
JPS5629576A (en) Phenylalkanamide compound, its preparation, and herbicide comprising the same
JPS5452014A (en) Isomerization of dichlorobutene
JPS52117299A (en) Semi-insulating single crystal of the group iii-v compounds
JPS6426501A (en) Growth controlling agent for sugar cane

Legal Events

Date Code Title Description
ST Notification of lapse