Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara Rt.

Todor Pfliegel

Jeno Seres

Lajos T Nagy

Antal Gajary

Istvan Bitter

Mihaly Nogradi

Sandor Antus

Agnes Gottsegen

Laszlo Institoris

Erzsebet Radvanyi Nee Hegedus

Lajos Guczoghy

Lorand Farkas

Lajos Ferenczy

Gizella Hamar Nee Nemes

Laszio Toke

Klara Daroczy Nee Csuka

Eva Karpati Nee Adam

Maria Puklics

Andras Franko

The invention relates to a process for the preparation of acyl ureas of formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are the same of different and each is halogen atom, preferably fluorine or chlorine atom, and

Process for the preparation of substituted acyl ureas

The invention relates to new synergistic fungicidal compositions comprising a mixture of (a) methyl 2-benzimidazolecarbamate or a precursor thereof, such as methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate and 1,2-bis(3-methoxy-carbonyl-2-thioureido)benzene and (b) 1H-.alpha.-butyl-.alpha.-phenylimidazol-1-yl-propanenitrile.

Synergistic fungicidal compositions

Compounds of the formula (1), or their salts, ##STR1## are prepared as follows: (A) A COMPOUND OF THE FORMULA (II) ##STR2## is reduced; or (B) A COMPOUND OF THE FORMULA (III) ##STR3## is reacted, e.g. after protecting the phenolic hydroxy group attached to position 3 of the ring, with a compound of the formula (IV), ##STR4## or (C) GROUP R.sup.1 of a compound of the formula (V) ##STR5## is removed in an acidic medium, AND, IF DESIRED, THE COMPOUND OF THE FORMULA (I) is converted into salt, or a salt of a compound of the formula (I) is converted into the free acid or another salt thereof. The compounds of the formula (I) and their salts are valuable artificial sweetening agents. In the above formulae

Acyl-phenoxy-propanesulfoacids and salts, and artificial sweetening

The invention relates to a new and improved method for the preparation of N-phosphonomethyl-glycine, a potent pre-emergence herbicide. According to the invention glycine, formaldehyde and a dialkyl phosphite are condensed in an aqueous alkaline medium to form a N-phosphonomethyl-glycine dialkyl ester, and the diester is hydrolyzed with a mineral acid.

Process for the preparation of N-phosphonomethyl-glycine

A compound selected from the group which consists of the amidine of formula ##STR1## and the phytotoxically acceptable addition salts, hemihydrates and hydrates thereof,

N-(triaryl-methyl)-amidines, process for the preparation thereof and

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Budapest, Hungary

Todor Pfliegel