HUT53602A - Process for production of herbicides from industrial by-products - Google Patents

Process for production of herbicides from industrial by-products

Info

Publication number
HUT53602A
HUT53602A HU168889A HU168889A HUT53602A HU T53602 A HUT53602 A HU T53602A HU 168889 A HU168889 A HU 168889A HU 168889 A HU168889 A HU 168889A HU T53602 A HUT53602 A HU T53602A
Authority
HU
Hungary
Prior art keywords
hydroxy
acid
benzoic
bromo
nitro
Prior art date
Application number
HU168889A
Other languages
Hungarian (hu)
Other versions
HU208950B (en
Inventor
Laszlo Simandi
Domokosne Zahonyi
Miklos Jaki
Zoltan Szeverenyi
Felix Hajdu
Gedeonne Kovacs
Original Assignee
Mta Koezponti Kemiai Kutato In
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 Mta Koezponti Kemiai Kutato In filed Critical Mta Koezponti Kemiai Kutato In
Priority to HU168889A priority Critical patent/HU208950B/en
Publication of HUT53602A publication Critical patent/HUT53602A/en
Publication of HU208950B publication Critical patent/HU208950B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

4-Hydroxy-3,5- di:bromo-benzo-nitrile and 4-hydroxy-3,5- di:iodo-benzo-nitrile, being active herbicide cpds. are prepd. from 4-chloso- di:nitro-benzoic-acid, or from industrial by products contg. it at 90% min. purity. 4-chloro-3,5- di :nitro-benzoic-acid is converted to 4-hydroxy-3,5- di:nitro-benzoic-acid by an alkali. This cpd. is reduced, diazotised and halogenated by sandmeyer reaction to 4-hydroxy-3,5- di:bromo-benzoic-acid. - The methyl ester of this acid is formed and is converted to 4-hydroxy-3,5- di:bromo-benzamide in the presence of ammonia and under pressure. Finally, 4-hydroxy-3,5- di:bromo-benzonitrile is prepd. from the benzamide by splitting off water
HU168889A 1989-04-07 1989-04-07 Process for production of herbicides from industrial by-products HU208950B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HU168889A HU208950B (en) 1989-04-07 1989-04-07 Process for production of herbicides from industrial by-products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU168889A HU208950B (en) 1989-04-07 1989-04-07 Process for production of herbicides from industrial by-products

Publications (2)

Publication Number Publication Date
HUT53602A true HUT53602A (en) 1990-11-28
HU208950B HU208950B (en) 1994-02-28

Family

ID=10955700

Family Applications (1)

Application Number Title Priority Date Filing Date
HU168889A HU208950B (en) 1989-04-07 1989-04-07 Process for production of herbicides from industrial by-products

Country Status (1)

Country Link
HU (1) HU208950B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100500648C (en) * 2006-12-29 2009-06-17 浙江工业大学 Synthesizing process of nitro iodo phenol cyanide

Also Published As

Publication number Publication date
HU208950B (en) 1994-02-28

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Legal Events

Date Code Title Description
HMM4 Cancellation of final prot. due to non-payment of fee