Alkaloida Vegyeszeti Gyar

Tibor Timar

Janos Repasi

Kalman Zsupan

Vilmos Galamb

Peter Maroy

Peter Sebok

Istvan Kiss

Tibor Eszenyi

Zoltan Salamon

Andras Fodor

Iren Borsos Nee Safranek

Gyula Papp

Laszlo Frank

Imre Gulyas

Istvan Gyoker

Sandor Hosztafi

E Biro Nee Czapary

Terezia Istvan

Istvan Szentkiralyi

Amdras Fodor

Terezia Istvan Nee Katona

Julia Fazekas

Julianna Nagy Nee Vajda

Erika Nagy

Eva Kovach Nee Lakatos

Jozsef Tompa

Iren Borsos Nee Spafranek

Ferenc Bartha

Agota Repasi Nee Veres

Gabor Somogyi

Istvan Fodor

Eva Kovach

Eva Fuzi Nee Porkolab

Julia Fazekas Nee Kozak

Dezso Miklos

Ilona Fabian Nee Orban

Tamas Bartik

Erika Nagy Nee Csaki

Marta Brendel Nee Hajnoczki

Istvan Csorvassy

Benzopyran derivatives

A process is disclosed for the preparation of (.+-.)-6-cyano-3,4-dihydro-2,2-dimethyl-trans-4-(2-oxo-1-pyrrol idino)-2H-1-benzopyran-3-ol of the Formula (VI) ##STR1## from 4-cyanophenol of the Formula (I) ##STR2## which comprises reacting 4-cyanophenol of the Formula (I) with isoprene, followed with bromination and dehydrobromination steps with formation of intermediates to react with 2-pyrrolidone resulting in obtaining the compound of the Formula (VI).

Process for the preparation of anti-hypertensive benzopyran

The invention relates to novel, herbicidally active 2-[4-(5-trifluoromethyl-2-pyridyloxy)phenoxy]-propionic acid derivatives of the general formula (I), ##STR1## The invention also relates to herbicide compositions containing the compounds of the general formula (I) as active ingredients as well as to a process for the preparation of these compounds and compositions.

Herbicidal, optically active or racemic substituted propionic acid

Process for the preparation of anti-hypertensive benzopyran derivative

The invention relates to a process for the preparation of Chromenes of the general Formula V ##STR1## prepared from chromanone derivatives.

Process for the preparation of chromene derivatives

The invention relates to a process for the preparation of chromenes of the general Formula V ##STR1## (wherein R.sup.1 and R.sup.2 are hydrogen, optionally halogeno substituted C.sub.1-6 alkyl or aryl;

Chromene derivatives and pesticidal composition comprising the same

The invention relates to pesticidal compositions comprising as active ingredient a compound of the general Formula I ##STR1## wherein R.sup.1 and R.sup.2 stand for hydrogen, optionally halogenosubstituted C.sub.1-6 alkyl or aryl;

Chromene derivatives useful as insecticides

The invention relates to a process for the preparation of DL-.beta.-aryl-amino acids of the general Formula ##STR1## wherein R, R.sub.1 and R.sub.2 stand for hydrogen, halogen, C.sub.1-6 alkyl, C.sub.1-6 alkoxy, nitro or C.sub.1-4 dialkylamino; whereby

Process for the preparation of D1-.beta.-aryl amino acids

N-phosphonomethylglycine is prepared from glycine and parsformaldehyde to obtain an intermediate which is reacted with dialkylphosphite to obtain an ester of the desired compound which is then hydrolyzed.

Process for the preparation of N-phosphonomethyl-glycine

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Tiszavasvari, Hungary

Tibor Timar