Abstract: The invention relates to benzopyran compounds of formula (I) possessing pharmacological activity, as well as to pharmaceutical compositions containing the compounds of formula (I) and processes for the preparation thereof.

Abstract: 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).

Abstract: 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.

Abstract: 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).

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

Abstract: 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;R.sup.3 and R.sup.7 stand for hydrogen, halogen or C.sub.1-6 alkyl;R.sup.4 represents C.sub.1-8 alkyl, aryl, aralkyl or a group containing a carbonyl group;R.sup.5 and R.sup.6 stand for C.sub.1-10 alkyl, aryl, amino, hydroxyalkyl, alkoxyalkenyl, alkylmercaptoalkyl, acyl, carboxy or an ester group or a halogen atom;n is 0 or 1)which comprises(a) for the preparation of compounds, in which R.sup.5 and R.sup.6 stand for different groups, reacting a compound of the general Formula I ##STR2## with an approximately equimolar, preferably 0.8-1.5 molar amount of a reactant of the general Formula R.sup.5 --X-related to the amount of the compound of the general Formula I (wherein R.sup.

Abstract: 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;R.sup.3 and R.sup.4 are hydrogen, halogen or C.sub.1-6 alkyl;R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are hydrogen, hydroxy, mercapto, amino, C.sub.1-10 alkyl; a group containing a methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, sec. butoxy, isobutoxy, tert. butoxy, n-pentyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, cycloheptyloxy, cyclooctyloxy, allyloxy, crotyloxy, prenyloxy, propargyloxy, substituted propargyloxy, C.sub.1-3 alkylenedioxy, aralkoxy, substituted aralkoxy, hydroxyalkoxy, alkoxyalkoxy, mercaptoalkoxyalkoxy, halogenoalkoxy, dihalogenoalkoxy, trihalogenoalkoxy, polyhalogenoalkoxy, N,N-dialkylaminoalkoxy, cycloalkylaminoalkoxy, alkylenoxy-alkyleneoxy, alkylene-thia-alkylenoxy or alkylene-aza-alkylenoxy unit or C.sub.

Abstract: 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; wherebyin the case of monosubstituted derivatives R and R.sub.1 are hydrogen and R.sub.2 has the same meaning as stated above and can be attached to position 2, 3 or 4 related to the methylene group;in the case of disubstituted derivatives R is hydrogen and R.sub.1 and R.sub.2 have the same meaning as stated above and are attached to positions 2,3; 2,4; 2,5; 2,6; 3,4 or 3,5 related to the methylene group;in the case of trisubstituted derivatives R, R.sub.1 and R.sub.2 have the same meaning as stated above and are attached to positions 2,3,4; 2,3,5; 2,3,6; 3,4,5 or 3,4,6 related to the methylene group.

Abstract: 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.