Diazinszármazékok szintézise; szerkezet-reaktivitás és szerkezet-biológiai hatás összefüggések vizsgálata = Synthesis of diazine derivatives; studies of structure-reactivity and structure-biological activity relationships

1. A terc-amino effektus 2. típusa amino(vinil)-diazinok körében: i) intramolekuláris ii) a vinil és aminoszubsztituensek geometriája és sztereoelektronos hatása jelentős iii) mikrohullámú besugárzással és/vagy oldószer nélkül magas hőmérsékleten kitűnő a konverzió. 2. Jód- és más halopiridazinokból Pd-katalizált reakciókkal policiklusos gyűrűrendszereket kaptunk. 3. Egy új jelentős antimaláriás hatású cryptolepin izomert állítottunk elő. Néhány jelentős SSAO enzimgátló molekulát szintetizáltunk. | 1. Type 2 tert.-amino effect in amino(vinyl)-diazines: i) is intramolecular ii) it is influenced significantly by the geometry and stereoelectronic effect of vinyl and amino substituents iii) excellent conversion could be achieved under microwave and/or solvent-free conditions. 2. The mechanism of formation of monoiodopyridazines from dihalopiridazines was investigated, and Pd-catalyzed reactions of iodo- and halopyridazines led to polycyclic systems. 3. A novel antimalarial cryptolepine isomer, isoneocryptolepine was synthesized in several steps based on a Suzuki reaction. Some new SSAO inhibitors were prepared

A terc-amino effektus vizsgálata és kiterjesztése: új típusú, biológiailag aktív policiklusos vegyületek előállítása = The study and the extension of the tert-amino effect: Synthesis of new types of polycyclic compounds with biological activities

1. Vizsgáltuk a terc-amino effektus 2. típusának kiterjesztését a reakcióban résztvevő vinil és terc-amino csoportot két külön gyűrűn tartalmazó (kondenzált) bi- és triaril - bifenil/fenilpiridazin, trifenil/difenilpiridazin, naftalin illetve fenilnaftalin - modellvegyületekre; a gyűrűzárási reakciók révén új azepin-, azocin-, azonin- és azecin-anellált gyűrűrendszereket állítottunk elő. E munkánk révén a terc-amino effektus az eddigi ismeretek szerinti alkalmazását lényegesen bővítettük. 2. Antimaláriás hatásirányban nemzetközi együttműködésben vizsgáltuk azocinszármazékok, illetve indolokinolin alkaloidok bi- és triciklusos analógjainak aktivitását. Ez utóbbiak közül két származék is jelentős in vitro aktivitást mutatott. 3. SSAO hatásirányban vizsgáltuk a terc-amino effektussal nyert diciano-szubsztituált azaheterociklusokból előállított aminometil származékok, illetve további vegyületcsaládok (oxim típusú vegyületek, aminometil-piridazinok) aktivitását; együttműködésben kiválasztott SSAO-gátlók további in vivo vizsgálatára került sor gyulladásos modelleken. E vegyületek egyike (SZV-1287) mind in vitro, mind in vivo jelentős SSAO-gátló és gyulladáscsökkentő hatást fejt ki; fejlesztéséről a közeljövőben döntünk. | 1. Novel extensions of the type 2 tert-amino effect have been studied to compounds having the interacting vinyl and tert-amino moieties on two different rings. Namely, cyclizations of bi- and triaryl - biphenyl/phenylpyridazine, triphenyl/diphenylpyridazine, napthalene and phenylnapthalene - model systems were studied, affording novel azepine-, azocine-, azonine- and azecine-fused ring systems. Our studies facilitate novel applications of the tert-amino effect as compared to cyclizations described thus far. 2. In the frame of an international collaboration, the antimalarial activity of azocine derivatives, and bi- and tricyclic analogues of indoloquinoline alkaloids were studied. Two representatives of the latter group exhibited substantial in vitro activity. 3. SSAO activity of aminomethyl derivatives obtained from dicyano-substituted azaheterocycles synthesized via tert-amino effect cyclization and further classes of compounds (oxime derivatives, aminomethyl-pyridazines) were studied; in collaboration in vivo activity of selected SSAO inhibitors were studied in inflammatory models. On selected derivative (SZV-1287) exhibited substantial in vitro and in vivo SSAO inhibitor and anti-inflammatory activity; we are to decide on its further development

Effects of Chemical Structures Interacting with Amine Oxidases on Glucose, Lipid and Hydrogen Peroxide Handling by Human Adipocytes

Benzylamine is a natural molecule present in food and edible plants, capable of activating hexose uptake and inhibiting lipolysis in human fat cells. These effects are dependent on its oxidation by amine oxidases present in adipocytes, and on the subsequent hydrogen peroxide production, known to exhibit insulin-like actions. Virtually, other substrates interacting with such hydrogen peroxide-releasing enzymes potentially can modulate lipid accumulation in adipose tissue. Inhibition of such enzymes has also been reported to influence lipid deposition. We have therefore studied in human adipocytes the lipolytic and lipogenic activities of pharmacological entities designed to interact with amine oxidases highly expressed in this cell type: the semicarbazide-sensitive amine oxidase (SSAO also known as PrAO or VAP-1) and the monoamine oxidases (MAO). The results showed that SZV-2016 and SZV-2017 behaved as better substrates than benzylamine, releasing hydrogen peroxide once oxidized, and reproduced or even exceeded its insulin-like metabolic effects in fat cells. Additionally, several novel SSAO inhibitors, such as SZV-2007 and SZV-1398, have been evidenced and shown to inhibit benzylamine metabolic actions. Taken as a whole, our findings reinforce the list of molecules that influence the regulation of triacylglycerol assembly/breakdown, at least in vitro in human adipocytes. The novel compounds deserve deeper investigation of their mechanisms of interaction with SSAO or MAO, and constitute potential candidates for therapeutic use in obesity and diabetes

Novel medium ring sized estradiol derivatives by intramolecular heck reactions

New steroids with a seven-, eight- or nine-membered D-ring have been synthesized from a D-seco-estrone derivative by a Grignard and an intramolecular Heck reactio