Abstract: Dye-donor element for use according to thermal dye transfer comprising least one dye corresponding to the general formula (I): ##STR1## wherein Z is --CN, --COOR.sup.1 or --CONR.sup.2 R.sup.3 ; R.sup.1 is --H, (cyclo)alkyl, or aryl; R.sup.2 and R.sup.3 is --H, (cyclo)alkyl, aryl, or R.sup.2 and R.sup.3 together represent the atoms necessary to complete a heterocyclic nucleus; R.sup.4 and R.sup.5 is --H, (cyclo)alkyl, aryl, a heterocyclic ring, SO.sub.2 R.sup.8, COR.sup.8, CSR.sup.8, POR.sup.8 R.sup.9, OR.sup.6, NR.sup.6 R.sup.7, SR.sup.6, or R.sup.4 and R.sup.5 together represent the atoms necessary to complete a aliphatic ring, a heterocyclic ring including a heterocyclic ring carrying a fused-on aliphatic or aromatic ring; R.sup.6 and R.sup.7 is (cyclo)alkyl, aryl, alkenyl, aralkyl, aryl, a heterocyclic group, or R.sup.6 and R.sup.7 together represent the atoms necessary to complete a 5- or 6-membered ring; R.sup.8 and R.sup.

Abstract: Dye-donor element for use according to thermal dye transfer comprising at least one dye corresponding to the general formula (I): ##STR1## wherein Z is --CN, --COOR.sup.1 or --CONR.sup.2 R.sup.3 ; R.sup.1 is --H, (cyclo) alkyl, or aryl; R.sup.2 and R.sup.3 is --H, (cyclo)alkyl, aryl, or R.sup.2 and R.sup.3 together represent the atoms necessary to complete a heterocyclic nucleus; R.sup.4 and R.sup.5 is --H, (cyclo)alkyl, aryl, a heterocyclic ring, SO.sub.2 R.sup.8, COR.sup.8, CSR.sup.8, POR.sup.8 R.sup.9, OR.sup.6, NR.sup.6 R.sup.7, SR.sup.6, or R.sup.4 and R.sup.5 together represent the atoms necessary to complete a aliphatic ring, a heterocyclic ring including a heterocyclic ring carrying a fused-on aliphatic or aromatic ring; R.sup.6 and R.sup.7 is (cyclo)alkyl, aryl, alkenyl, aralkyl, aryl, a heterocyclic group, or R.sup.6 and R.sup.7 together represent the atoms necessary to complete a 5- or 6-membered ring; R.sup.8 and R.sup.

Abstract: Chromogenic dicyanomethylenepyrazolinone for thermographic recording processes and the corresponding cyanomethylene dyes of the formula ##STR1## in which R is hydrogen, hydroxyl, amino, alkyl, cycloalkyl, aryl, aralkyl or a heterocyclic radical, T.sub.1 and T.sub.2, independently of one another, are each hydrogen, unsubstituted or halogen-, hydroxyl-, cyano- or lower alkoxy-substituted alkyl having a maximum of 12 carbon atoms, cycloalkyl having 5 to 10 carbon atoms or unsubstituted or halogen-, cyano-, lower alkyl- or lower alkoxy-(ring)substituted phenalkyl or phenyl, or T.sub.1 and T.sub.2 together with the nitrogen linking them are a five- or six-membered heterocyclic radical, and rings A and B, independently of one another, are unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, (lower alkyl)carbonyl or (lower alkoxy)carbonyl.

Abstract: Chromogenic dicyanomethylenepyrazolinone for thermographic recording processes and the corresponding cyanomethylene dyes of the formula ##STR1## in which R is hydrogen, hydroxyl, amino, alkyl, cycloalkyl, aryl, aralkyl or a heterocylic radical, T.sub.1 and T.sub.2, independently of one another, are each hydrogen, unsubstituted or halogen-, hydroxyl-, cyano- or lower alkoxy-substituted alkyl having a maximum of 12 carbon atoms, cycloalkyl having 5 to 10 carbon atoms or unsubstituted or halogen-, cyano-, lower alkyl- or lower alkoxy-(ring)substituted phenalkyl or phenyl, or T.sub.1 and T.sub.2 together with the nitrogen linking them are a five- or six-membered heterocyclic radical, and rings A and B, independently of one another, are unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, (lower alkyl)carbonyl or (lower alkoxy)carbonyl.

Abstract: Chromogenic dicyanomethylenepyrazolinone for thermographic recording processes and the corresponding cyanomethylene dyes of the formula ##STR1## in which R is hydrogen, hydroxyl, amino, alkyl, cycloalkyl, aryl, aralkyl or a heterocyclic radical, T.sub.1 and T.sub.2, independently of one another, are each hydrogen, unsubstituted or halogen-, hydroxyl-, cyano- or lower alkoxy-substituted alkyl having a maximum of 12 carbon atoms, cycloalkyl having 5 to 10 carbon atoms or unsubstituted or halogen-, cyano-, lower alkyl- or lower alkoxy-(ring)substituted phenalkyl or phenyl, or T.sub.1 and T.sub.2 together with the nitrogen linking them are a five- or six-membered heterocyclic radical, and rings A and B, independently of one another, are unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, (lower alkyl)carbonyl or (lower alkoxy)carbonyl.

Abstract: A method for the preparation of 2,3,5-trimethylpyridine and some of its derivatives.

Abstract: The invention relates to a process for the production of polyurethanes, in particular of polyurethane elastomers under use of diols and diisocyanates as well as optionally chain extenders, comprising the improvement of using diols or optionally chain extenders having at least one terminal group of the formula ##STR1## wherein X is a straight or branched alkylene group with 2 to 12 C-atoms. The diols or chain extenders are mainly polymers or oligomers of ethylenically unsaturated monomers and preferably have a hydroxyl functionality in the proximity of 2, preferably of 1,9 to 2,1.The invention further relates to a process for the radical polymerization, comprising the improvement of polymerizing ethylenically unsaturated monomers in the presence of azo-bis-N,N'-isobutyric acid hydroxyalkyl amides of the general formula ##STR2## wherein X is a straight or branched alkylene group with 2 to 12 C-atoms.

Abstract: Process for the production of 4,6-diamino-5-cyano-3-aryl-isoxazole [5,4-b] pyridines having the formula: ##STR1## wherein (a) R.sup.1 and R.sup.2 are --H or (b) R.sup.1 is --Cl and R.sup.2 is --H, or (c) R.sup.1 is --CH.sub.3 and R.sup.2 is --H or (d) R.sup.1 is --NO.sub.2 and R.sup.2 is --H, or (e) R.sup.1 is --H and R.sup.2 is --NO.sub.2. 2-Amino-1-propane-1,1,3-tricarbonitrile having the formula: ##STR2## is reacted with a benzohydroxamino acid chloride having the formula: ##STR3## wherein R.sup.1 and R.sup.2 have the same meaning as above, in the presence of a strong base in at least a molar quantity.

Abstract: An intermediate product of the formula ##STR1## is reacted with NaOH or KOH at 50.degree.-110.degree. to produce 4-amino-6-hydroxy-3-aryl-isoxazolo [5,4-b] pyridine-5-carbonitrile.

Abstract: Process for the production of 4-amino-6-hydroxy-3-aryl isoxazolo [5,4-b] pyridine-5-carbonitriles having the formula: ##STR1## wherein R (a) is --H, (b) is --Cl or (c) is --CH.sub.3. 3-Amino-2,4,dicyanocrotonic acid methyl ester having the formula: ##STR2## is reacted with a benzohydroxyamino acid chloride having the formula: ##STR3## wherein R has the same meaning as above, in the presence of a strong base (at least molar) at a temperature of up to 10.degree. C. to produce, as an intermediate, the corresponding 3-amino-2-cyano-3-(5-amino-3-aryl-isoxazol-4-yl)-acrylic acid methyl ester having the formula ##STR4## wherein R has the same meaning as above. The intermediate product is reacted in excess diluted NaOH or KOH at a temperature of 50.degree. to 110.degree. C. to produce the corresponding 4-amino-6-hydroxy-3-aryl-isoxazolo [5,4-b] pyridine-5-carbonitrile.

Abstract: Process for the production of 4,6-diamino-5-cyano-3-aryl-isoxazole [5,4-b] pyridines having the formula: ##STR1## wherein (a) R.sup.1 and R.sup.2 are --H or (b) R.sup.1 is --Cl and R.sup.2 is --H, or (c) R.sup.1 is --CH.sub.3 and R.sup.2 is --H or (d) R.sup.1 is --NO.sub.2 and R.sup.2 is --H, or (e) R.sup.1 is --H and R.sup.2 is --NO.sub.2. 2-Amino-1-propane-1,1,3-tricarbonitrile having the formula: ##STR2## is reacted with a benzohydroxamino acid chloride having the formula: ##STR3## wherein R.sup.1 and R.sup.2 have the same meaning as above, in the presence of a strong base in at least a molar quantity.

Abstract: Process for the production of aminomalonic acid dinitrile from a malonic acid dinitrile compound, such as oximinomalonic acid dinitrile or phenylazomalonic acid dinitrile. The reaction is carried out at an elevated hydrogen pressure in the presence of Raney catalysts and a solvent. When tetrahydrofurane is used as a solvent, the reaction product is precipitated with p-toluene sulfonic acid. When acetic anhydride is used as solvent, the reaction product is precipitated as acetyl aminomalonic acid dinitrile.

Abstract: A process for preparing a 4-hydroxyphenyl-1,3-dioxo-2-indenylidene-acetonitrile. The process includes reacting 2-dicyanomethylene-1,3-indanione with a phenol having the formula: ##SPC1##Wherein R.sub.1 and R.sub.2 are the same or different and are each hydrogen, halogen, cyano, alkyl having one to four carbon atoms or alkoxy having one to four carbon atoms, at a temperature between 150.degree. and 250.degree.C. The reaction is preferably conducted in the presence of an organic solvent.A 4-hydroxyphenyl-1,4-dioxo-2-indenylidene-acetonitrile having the formula: ##SPC2##Wherein R.sub.1 and R.sub.2 are the same or different and are each hydrogen, halogen, cyano, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms. Such compounds are useful as indicators.