ES469180A1 - Procedure for the preparation of a herbicide derived from piridine. (Machine-translation by Google Translate, not legally binding) - Google Patents

Procedure for the preparation of a herbicide derived from piridine. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES469180A1
ES469180A1 ES469180A ES469180A ES469180A1 ES 469180 A1 ES469180 A1 ES 469180A1 ES 469180 A ES469180 A ES 469180A ES 469180 A ES469180 A ES 469180A ES 469180 A1 ES469180 A1 ES 469180A1
Authority
ES
Spain
Prior art keywords
temperature
translation
pyridine
preparation
machine
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.)
Expired
Application number
ES469180A
Other languages
Spanish (es)
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.)
DE RELACIONES INTERNA Cia
Original Assignee
DE RELACIONES INTERNA Cia
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 DE RELACIONES INTERNA Cia filed Critical DE RELACIONES INTERNA Cia
Priority to ES469180A priority Critical patent/ES469180A1/en
Publication of ES469180A1 publication Critical patent/ES469180A1/en
Expired legal-status Critical Current

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  • Pyridine Compounds (AREA)

Abstract

Process for the preparation of a herbicide derived from pyridine, specifically one containing as active ingredient 1,1-dimethyl-4,4-dipyridyl dimethyl sulfate, of structural formula: ** (see formula) ** Characterized in that the active principle is obtained by sequentially carrying out the following steps: slowly reacting pyridine and sodium at room temperature or lower, until the reaction is completed, heating, finally, up to 115º c; then oxidize by dry oxygen maintaining the temperature of the mixture at 80º c; distilling off unreacted pyridine by distillation; wash the residue with water at 0º c; and, finally, separating the formed bipyridyl crystals, recrystallizing them in water and then reacting them with dimethyl sulphate, added slowly, so that the temperature gradually rises to 95ºC and the ph reaches the value 5, then cooling to 80ºC to continue the addition of dimethyl sulfate, maintaining the temperature at 80º c, until reaching a ph comprised between 3 and 3.5. (Machine-translation by Google Translate, not legally binding)
ES469180A 1978-04-26 1978-04-26 Procedure for the preparation of a herbicide derived from piridine. (Machine-translation by Google Translate, not legally binding) Expired ES469180A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES469180A ES469180A1 (en) 1978-04-26 1978-04-26 Procedure for the preparation of a herbicide derived from piridine. (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES469180A ES469180A1 (en) 1978-04-26 1978-04-26 Procedure for the preparation of a herbicide derived from piridine. (Machine-translation by Google Translate, not legally binding)

Publications (1)

Publication Number Publication Date
ES469180A1 true ES469180A1 (en) 1978-10-16

Family

ID=8475931

Family Applications (1)

Application Number Title Priority Date Filing Date
ES469180A Expired ES469180A1 (en) 1978-04-26 1978-04-26 Procedure for the preparation of a herbicide derived from piridine. (Machine-translation by Google Translate, not legally binding)

Country Status (1)

Country Link
ES (1) ES469180A1 (en)

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