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
HUT53602AHU168889AHU168889AHUT53602AHU T53602 AHUT53602 AHU T53602AHU 168889 AHU168889 AHU 168889AHU 168889 AHU168889 AHU 168889AHU T53602 AHUT53602 AHU T53602A
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 InfiledCriticalMta Koezponti Kemiai Kutato In
Priority to HU168889ApriorityCriticalpatent/HU208950B/en
Publication of HUT53602ApublicationCriticalpatent/HUT53602A/en
Publication of HU208950BpublicationCriticalpatent/HU208950B/en
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
HU168889A1989-04-071989-04-07Process for production of herbicides from industrial by-products
HU208950B
(en)
METHOD FOR THE PREPARATION OF ACID 5-ACETAMIDO-2,3,4,5-TETRADESOXI-4-GUANIDINO-D-GLICERO-D-GALACTO-NON-2-ENO-PIRANOSONICO AND PRODUCT OBTAINED FROM THE SAME.