RU92004413A -
ADVANCED METHOD FOR OBTAINING DIHYDROPYRIDINDICARBOXYLATES
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ADVANCED METHOD FOR OBTAINING DIHYDROPYRIDINDICARBOXYLATES
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Publication number
RU92004413A
RU92004413ARU92004413/04ARU92004413ARU92004413ARU 92004413 ARU92004413 ARU 92004413ARU 92004413/04 ARU92004413/04 ARU 92004413/04ARU 92004413 ARU92004413 ARU 92004413ARU 92004413 ARU92004413 ARU 92004413A
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Publication of RU92004413ApublicationCriticalpatent/RU92004413A/en
Предложен улучшенный способ дегидратации диалкиловых эфиров 2,6-бис-(трифторметил)-2,6-дигидрокси-4-(алкил)-3,5-пеперидиндикарбоновых кислот с использованием концентрированной серной кислоты по существу в отсутствие растворителя для получения соответствующих диалкиловых эфиров 2,6-бис(трифторметил)-дигидро-4-(алкил)-3,5-пиридинкарбоновых кислот.An improved method for the dehydration of dialkyl ethers of 2,6-bis- (trifluoromethyl) -2,6-dihydroxy-4- (alkyl) -3,5-peperidinedicarboxylic acids using concentrated sulfuric acid essentially in the absence of a solvent to obtain the corresponding dialkyl ethers , 6-bis (trifluoromethyl) -dihydro-4- (alkyl) -3,5-pyridinecarboxylic acids.
RU92004413/04A1992-01-211993-01-20
ADVANCED METHOD FOR OBTAINING DIHYDROPYRIDINDICARBOXYLATES
RU92004413A
(en)
PYRIMIDIN DERIVATIVE, HERBICIDE COMPOSITION, PROCESS FOR KILLING WEEDS, PROCESS TO PRODUCE A PYRIMIDINE DERIVATIVE, PROCESS TO PRODUCE A 2,6-BIS ACID - ((4,6-DISSUBSTITUTED PIRIMIDIN-2-II) OXI) BENZ TO PRODUCE A COMPOUND