Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara Rt.

Magyar Tudomanyos Akademia

Richter Gedeon Vegyeszeti Gyar Rt

Pesci Dohanygyar

Forte Photochemical Industry

Laszlo Toke

Gabor T Szabo

Csaba Szantay

Lajos Szabo

Sandor Virag

Agoston David

Istvan Tibor Toth

Istvan Bitter

Istvan Rusznak

Erzsebet Kanyo

Lajos T Nagy

Erno Pungor

Rudolf Soos

Jeno Havas

Elemer Fogassy

Klara Szepesvary Nee Toth

Erno Lindner

Bela Gai

Kalman Harsanyi

Tibor Gizur

Geza Toth

Ferenc Faigl

Lajos Trezl

Tibor Szarvas

Jozsef Nemes

Rezso Kolta

Zsuzsanna Aracs Nee Tischler

Miklos Szucs

Sandor Irimi

Jozsef Gabor

Adam Molnar

Viktoria Horvath

Maria Horvath

Judit Csaplaros

Peter Bencsik

Laszlo Fenichel

Maria Forro Nee Horvath

Peter Bako

Jozsef Bozzay

Janos Becso

Zsuzsanna Martonffy Nee Jaszay

Katalin Berki

Maria Cs

Process for the resolution of

The invention relates to a novel process for the chemical sensitization of silver halide photographic emulsions. The process according to the invention comprises adding as additional sensitizing agents a 40-260 .mu. moles/mole of a cyclic polyether containing 1 nitrogen and 5 oxygen atoms, or 2 nitrogen and 4 oxygen atoms, or 3 nitrogen and 3 oxygen atoms, or 4 nitrogen and 2 oxygen atoms as well as 12 carbon atoms and/or their complexes formed with gold and/or palladium and optionally 40-260 .mu. moles/mole of silver halide) of gold (I) or gold (III) sulfide to the sulfur-sensitized emulsion, and employing the cyclic polyether in relation to the noble metal salt in a molar ratio of 0.5:1-5:1 for the complex formation.

Process for the chemical sensitization of silver halide photographic

The invention relates to a novel, highly efficient tobacco smoke filter provided with mechanically (fibrous) and/or adsorptively filtering materials as well as chemosorptively filtering components, which comprises a synergistic composition containing at least one of a compound having a high nucleophilic additivity, capable of chemically reacting and stable adduct forming with excited and ground-level aldehydes not filtered out by the mechanically and/or adsorptively filtering materials; and at least one of a compound containing ##STR1## enediol structural moieties, wherein the enediol type compound or its combination suitably amount to at least 50% by weight of the other chemosorptive components and 40 to 300% by weight of the adsorptively filtering materials.

Highly efficient tobacco smoke filter

The invention relates to new crown ether derivatives of the general Formula I ##STR1## and a process for the preparation thereof wherein Z.sup.1 is a group of the general Formula ##STR2## R.sub.a and R.sub.b may be the same or different and R.sub.a represents an alkyl group having 1-4 carbon atoms and R.sub.b is an alkyl group having 1-20 carbon atoms. The new crown ethers are useful in the preparation of ion-selective electrodes having a long lifetime.

New crown ether derivatives, process for the preparation thereof and

Crown ether compounds, process for the preparation of the crown ether

The invention relates to a process for the preparation of enantiomers of trans vinyl-cyclopropane carboxylic acids of the formula I, ##STR1## wherein R is a methyl group or chlorine atom, by resolution of racemic trans compound or mixture of racemic cis and trans compounds by using (+)- or (-)-N-(1-formamido-2,2,2-trichloroethyl)-piperazine as a resolving agent in a polar solvent then separating the crystallizing salt of (+)-trans carboxylic acid and (-)-resolving agent or (-)-trans carboxylic acid and (+)-resolving agent from the mother liquor by filtration and obtaining the enantiomers by acidifying the mother liquor or the salts suspended in water followed by extraction with a solvent and evaporation. The products so obtained may be used as starting materials for the preparation of insecticides.

Process for the preparation of optically active cyclopropane carboxylic

The invention concerns a new process for the preparation of polyhalogenphenyl carbamates of the formula (I)

Process for the preparation of polyhalogenphenyl carbamates

An antiphlogistic compound of the formula (I) ##STR1## or a pharmaceutically effective salt thereof wherein R.sup.1 and R.sup.2 are hydrogen or C.sub.1-4 alkoxy or together form a methylenedioxy group;

Benzo(a)quinolizidine derivatives

The invention relates to a process for nucleophilic substitution reactions. According to the invention the reaction is carried out in a hetergeneous system, consisting of a solid and a dissolved reactant, one or several organic solvents, one or several linear polyether derivatives, and/or amino compounds and water. The volume of the water is preferably at the most 100% of the volume of the organic solvent and more preferably 5%.

Process for heterogeneous nucleophilic substitution reactions

The invention relates to a process for nucleophilic substitution reactions. According to the invention the reaction is carried out in a heterogeneous system, consisting of a solid and a dissolved reactant, one or several organic solvents, one or several linear polyether derivatives, and/or amino compounds and water. The volume of the water is preferably at the most 100% of the volume of the organic solvent and more preferably 5%. According to the invention the anhydrous reaction medium which is difficult to ensure, is not necessary and the use of the expensive and in industrial scales unavailable crown ethers is eliminated.

2-oxo-3-(.beta.-cyanoethyl)-9,10-methylenedioxy-1,2,3,4,6,7-hexahydro-11bH- benzo(a)quinolizidine (SC-118) especially and the corresponding 9,10-diethoxy compound are superior antiphlogistics which are used in effective amounts in antiphlogistic therapy.

Antiphlogistic method of treatment

A process for the preparation of a compound of the formula I or a salt thereof ##STR1## wherein R.sup.1 and R.sup.2 each represent hydrogen or a C.sub.1-4 alkoxy group, or together form a methylenedioxy group;

Process for the preparation of benzo(a)quinolizidine derivatives

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Budapest, Hungary

Laszlo Toke