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Lerida Union Quimica S A
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Lerida Union Quimica S A
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Application filed by Lerida Union Quimica S AfiledCriticalLerida Union Quimica S A
Priority to ES553523ApriorityCriticalpatent/ES8706706A3/en
Publication of ES553523A0publicationCriticalpatent/ES553523A0/en
Publication of ES8706706A3publicationCriticalpatent/ES8706706A3/en
Agricultural Chemicals And Associated Chemicals
(AREA)
Abstract
N-phosphono methyl glycine, for use as a herbicide, is made by (a) reacting formaldehyde and glycine with diethyl or dimethyl phosphite in an aq. soln. of NaOH or KOH at 40-100 deg. C, to give a cpd. of formula (RO)2POCH2NHCH2COOH, in which R is ethyl or methyl; and (b) acid hydrolysis to obtain the desired prod. which is isolated by conventional means. The glycine and phosphite are used in equimolar amounts, with a large excess of formaldehyde.
ALQUIL- AND ALQUENIL-SULFONILUREAS WITH HETERO CYCLIC SUBSTITUTES, PROCESS OF OBTAINING AND USE OF THE SAME AS HERBICIDES AND REGULATORS OF PLANT GROWTH.