Patent Publication Number: US-3880868-A

Title: 2-(Substituted amino) quinolizinium bromides

Description:
United States Patent [191 Alairno et a1.  
 [ Apr. 29, 1975 Z-(SUBSTITUTED AMINO) QUINOLIZINIUM BROMIDES [75] inventors: Robert J. Alaimo; Marvin M.  
  Goldenberg, both of Norwich, NY.  
 [73] Assignee: Morton-Norwich Products, Inc.,  
 Norwich, N.Y.  
  22 Fiied: Aug. 7, 1972 [21] Appl. No.: 278,618  
 [52] US. Cl 260/296 B; 260/156; 424/263 [51] Int. Cl C07d 31/42 [58] Field of Search 260/296 B Primary ExaminerA1an L. Rotman Attorney, Agent, or Firm--Anthony J. Franze [5 7] ABSTRACT Z-(Substituted amino) quinolizinium bromides are useful anti-inflammatory agents.  
 1 Claim, No Drawings 1 Z-(SUBSTITUTED AMINO) QUINOLIZINIUM BROMIDES This invention relates to 2-(substituted amino) quinolizinium bromides and particularly to those of the formula:  
 wherein R is hydrogen or methyl; R, is hydrogen or amino, and R is hydroxyethyl, 2,3-dihydroxypropyl, p-phenylazoanilino or m-trifluoromethylanilino.  
  The compounds of this invention possess marked anti-inflammatory activity. When administered perorally in aqueous suspension at a dose of 300 mg/kg to rats which thereafter receive a subplantar injection of 0.05 ml. of a 1% solution of carrageen (Viscarin in the hindfoot, edema of the foot is greatly reduced. They are thus useful agents in combatting swelling and edema in animal tissue.  
  The method which is currently preferred for the preparation of the compounds of this invention consists in bringing together 2-bromo-6-methylquinolizinium bromide or 2-bromoquinolizinium bromide and the appropriate amine in a suitable solvent such as ethanol or isopropanol preferably under the influence of heat.  
  In order that this invention may be understood by and readily available to those skilled in the art the following illustrative examples are supplied.  
 EXAMPLE 1 2-[ l-( 2-Hydroxyethyl)hydrazino]-6- methyl]quinolizinium Bromide Anal. Calcd. for C H BrN oz C, 48.33. H, 5.41; Br, 26.80. Found: C, 48.48; H, 5.28; Br, 26.81;  
 EXAMPLE ll 2-(2,3-Dihydroxypropylamino)quinolizinium Bromide To a solution of 2-bromoquinolizinium bromide (8.0  
 g, 0.3 mole) in ethanol (150 ml.) was added l-amino- 2,3-propanediol (4.0 g, 0.04 mole). The stirred mixture was boiled under reflux for 3 hours. Cooling of the reaction mixture in an ice bath along with vigorous scratching precipitated a dark redbrown solid. The product (5.0 g, 60%) was recrystallized from ethanol to provide salmon colored crystals which melted at 166-168. ,21  
 EXAMPLE ni 2-(p-Phenylazoanilino)quinolizinium Bromide To a solution of 2-bromoquinolizinium bromide (15.0 g, 0.05 mole) in isopropanol (300 ml.) was added p-phenylazoaniline (18.0 g, 0.09 mole). The stirred mixture was boiled under reflux for 4.0 hours. The reaction mixture was chilled in an ice bath and the solid was removed by filtration, providing 10.0 g. of maroon powder. The supernatant solution provided 9.0 g. additional reddish powder, making the total yield 19.0 g. Recrystallization from isopropanol/ethanol and again from ethanol/ether provided a rust-colored powder melting at 239-240.  
 Anal. Calcd.  
 for C H BrM: C, 62.23; H, 4.23; N, 13.95; Br,  
 Found: C, 61.94, 62.07; H, 4.23, 4.29;  
 N, 13.65, 13.67; Br, 19.80. 19.67.  
  EXAMPLE 1V 2-(m-Trifluoromethylanilino)quinolizinium Bromide To a solution of 2-bromoquinolizinium bromide (45 g, 0.15 mole) in ethanol (600 ml.) was added mtrifluoromethylaniline (50 g, 0.30 mole). The stirred mixture was boiled under reflux for 5 hours, then treated with Darco and filtered. The product was precipitated with ether. The crude product weighed 42 g, (76%). Recrystallization from isopropanol/ether provided material that melted at 229-240,  
 Anal. Calcd. for C H BrF N z C, 52.05; Found: C, 51.96;  
 What is claimed is: l. The compound 2-(m-trifluoromethylanilino)- quinolizinium bromide.