caa a22 4500 469038438 CHVBK 20180323132802.0 cr unu---uuuuu 170328e19920301xx s 000 0 ger 10.1007/BF00810471 doi (NATIONALLICENCE)springer-10.1007/BF00810471 Über Reaktionen von Arylbiguaniden mit Benzoin beim pH der Biguanidbasen [Elektronische Daten] [H. Schramm, F. Belaj] Reactions of arylbiguanides with benzoin at the pH of the biguanide bases Summary: Arylbiguanides2 a-e react with benzoin (1) at thepH of the base to two different products.1 undergoes in presence of the base2 a-e oxidation to benzil and benzoic acid, which reacts fast with the arylbiguanides2 a-e to yield N-[4-(arylamino)-6-phenyl-1,3,5-triazine-2-yl]benzamides3 a-d. After lowering thepH of the reaction mixture, the bases2 b-e react with benzil to yield 2-[1-aryl-5-oxo-4,4-diphenyl-2-imidazoline-2-yl]guanidine4 b-e. The mechanism of the formation is discussed. The structure of4b was established from a single crystal x-ray structure analysis. The analysis was carried out at 100K: C23H21N5O,M r=383.5, monoclinic, C 2/c,a=15.842(6),b=8.419(3),c=30.223(10) Å, β=98.44(3)°,V=3 987.3(9) Å3,Z=8,d x=1.277 g/cm3, μ=0.81 cm−1,R=5.89%R w=4.97% (1 537 observations, 233 parameters). Springer-Verlag, 1992 Benzoin nationallicence reaction with arylbiguanides nationallicence Triazines (N-[4-(arylamino)-6-phenyl-1,3,5-triazine-2-yl]benzamide) nationallicence Imidazoles (2-[1-aryl-5-oxo-4,4-diphenyl-2-imidazoline-2-yl]guanidine) nationallicence Synthesis nationallicence NMR-data nationallicence X-ray analysis nationallicence Schramm H. Institut für Pharmazeutische Chemie, Karl-Franzens-Universität Graz, A-8010, Graz, Österreich aut Belaj F. Institut für Anorganische Chemie, Karl-Franzens-Universität Graz, A-8010, Graz, Österreich aut Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/3(1992-03-01), 237-246 0026-9247 123:3<237 1992 123 706 https://doi.org/10.1007/BF00810471 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00810471 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schramm H. Institut für Pharmazeutische Chemie, Karl-Franzens-Universität Graz, A-8010, Graz, Österreich aut NATIONALLICENCE 700 1- Belaj F. Institut für Anorganische Chemie, Karl-Franzens-Universität Graz, A-8010, Graz, Österreich aut NATIONALLICENCE 773 0- Monatshefte für Chemie / Chemical Monthly Springer-Verlag 123/3(1992-03-01), 237-246 0026-9247 123:3<237 1992 123 706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer