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SM ISO690:2012 MELNIK, E., KRAVTSOV, Victor, BACHINSKII, Sergey, ISHKOV, Yu., PAVLOVSKY, Victor, ANDRONATI, Sergei. Synthesis and structure of 3-(1-naphthylmethylene)-,3-(2-naphthylmethylene)-, 3-(9-anthrylmethylene)-, 3-(quinolin-5-ylmethylene)-, and 3-(quinoxalin-5-ylmethylene)-1,2-dihydro-3H-1,4-benzodiazepin-2-ones. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 153. |
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Materials Science and Condensed Matter Physics Ediția 9, 2018 |
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Conferința "International Conference on Materials Science and Condensed Matter Physics" 9, Chișinău, Moldova, 25-28 septembrie 2018 | |||||||
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The search on new candidates for selective ligands of benzodiazepine receptors, and potential analgesics, stimulate us to synthesize the naphthalide- and heteronaphthalide-1,4-benzodiazepines. Condensation of 1,4-benzodiazepin-2-one 1 with 1- and 2-naphthalene, 9-anthracene and a number of quinoline and quinoxaline carbaldehydes resulted in 3-substituted 1,4-benzodiazepin-2-ones 2- 10. The structure of compounds 2-10 was confirmed by mass spectrometry and 1H NMR spectroscopy, and for (3Z)-7-bromo-5-phenyl-3-(quinoxalin-5-ylmethylene)-1,3-dihydro-2H-1,4- benzodiazepin-2-one 10 also by the X-ray diffraction method. The compound 10 crystallizes in the triclinic P-1 space group, a=7.9689(6), b=10.8434(8), c=12.5840(9) Å; α=80.627(6), β=75.074(6), =81.439(6), V=1030.1(1) Å3, Z=2 with one molecule per asymmetric unit. The seven-membered benzodiazepine ring in the molecule has the boat conformation. The N(1)–H•••O=C(2)=2.893(4) Å hydrogen bonds unite the molecules into centrosymmetric dimer forming R22(8) supramolecular synthon. The double C2=O2, N4=C5, and C3=C12 bond distances are equal to 1.221 (3), 1.276 (3), and 1.342 (4) Å, respectively. The planar quinoxaline fragments of neighboring center-symmetry related molecules reside in parallel planes with interplanar separation 3.501 Å, nevertheless they do not revealed the pronounced stacking interaction: the shortest centroid•••centroid benzene/benzene and benzene/pyrazine distances equal 4.093 and 4.242 Å, respectively. The C-H•••N6= 3.397 Å interactions unite the dimeric associates in the chain along crystallographic axis c. |
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<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'> <dc:creator>Melnic, E.I.</dc:creator> <dc:creator>Kravţov, V.H.</dc:creator> <dc:creator>Bachinskii, S.Y.</dc:creator> <dc:creator>Ishkov, Y.V.</dc:creator> <dc:creator>Pavlovsky, V.I.</dc:creator> <dc:creator>Andronati, S.A.</dc:creator> <dc:date>2018</dc:date> <dc:description xml:lang='en'><p>The search on new candidates for selective ligands of benzodiazepine receptors, and potential analgesics, stimulate us to synthesize the naphthalide- and heteronaphthalide-1,4-benzodiazepines. Condensation of 1,4-benzodiazepin-2-one <strong>1 </strong>with 1- and 2-naphthalene, 9-anthracene and a number of quinoline and quinoxaline carbaldehydes resulted in 3-substituted 1,4-benzodiazepin-2-ones <strong>2- 10</strong>. The structure of compounds <strong>2-10 </strong>was confirmed by mass spectrometry and 1H NMR spectroscopy, and for (3Z)-7-bromo-5-phenyl-3-(quinoxalin-5-ylmethylene)-1,3-dihydro-2H-1,4- benzodiazepin-2-one <strong>10 </strong>also by the X-ray diffraction method. The compound <strong>10 </strong>crystallizes in the triclinic <em>P-1 </em>space group, <em>a</em>=7.9689(6), <em>b</em>=10.8434(8), <em>c</em>=12.5840(9) Å; α=80.627(6), <em>β</em>=75.074(6), =81.439(6), <em>V</em>=1030.1(1) Å3, Z=2 with one molecule per asymmetric unit. The seven-membered benzodiazepine ring in the molecule has the boat conformation. The N(1)–H•••O=C(2)=2.893(4) Å hydrogen bonds unite the molecules into centrosymmetric dimer forming R22(8) supramolecular synthon. The double C2=O2, N4=C5, and C3=C12 bond distances are equal to 1.221 (3), 1.276 (3), and 1.342 (4) Å, respectively. The planar quinoxaline fragments of neighboring center-symmetry related molecules reside in parallel planes with interplanar separation 3.501 Å, nevertheless they do not revealed the pronounced stacking interaction: the shortest centroid•••centroid benzene/benzene and benzene/pyrazine distances equal 4.093 and 4.242 Å, respectively. The C-H•••N6= 3.397 Å interactions unite the dimeric associates in the chain along crystallographic axis <em>c</em>. </p></dc:description> <dc:source>Materials Science and Condensed Matter Physics (Ediția 9) 153-153</dc:source> <dc:title>Synthesis and structure of 3-(1-naphthylmethylene)-,3-(2-naphthylmethylene)-, 3-(9-anthrylmethylene)-, 3-(quinolin-5-ylmethylene)-, and 3-(quinoxalin-5-ylmethylene)-1,2-dihydro-3H-1,4-benzodiazepin-2-ones</dc:title> <dc:type>info:eu-repo/semantics/article</dc:type> </oai_dc:dc>