Benzylammonium chloride → 6-Acetamido-4-benzylamino2-methyl-quinoline hydrochloride

HRID 580812Notes

Reaction equation

HRID 580812 reaction equation
[ClH:1].[CH2:2]([NH2:9])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[C:10]([NH:13][C:14]1[CH:15]=[C:16]2[C:21](=[CH:22][CH:23]=1)[N:20]=[C:19]([CH3:24])[CH:18]=[C:17]2OC)(=[O:12])[CH3:11]>O.C(O)CCC>[ClH:1].[C:10]([NH:13][C:14]1[CH:15]=[C:16]2[C:21](=[CH:22][CH:23]=1)[N:20]=[C:19]([CH3:24])[CH:18]=[C:17]2[NH:9][CH2:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1)(=[O:12])[CH3:11]

Participants

5

Reactant 2

HCID 2724127Benzylammonium chlorideHCID 4785621N-(4-methoxy-2-methylquinolin-6-yl)acetamide

Product 1

HCID 675615946-Acetamido-4-benzylamino2-methyl-quinoline hydrochlorideYield 75%

Reagents, catalysts & solvents 2

HCID 2631-ButanolSolventHCID 962WaterSolvent

Conditions

Temperature
100 °C

Procedure

A warm solution of benzylamine hydrochloride in water (1 mL) was added to a mixture of 6-acetamido-4-methoxy-2-methyl-quinoline (1.0 g, 4.3 mmol) in n-butanol (10 mL) after which complete solution occurred. The solution was stirred for 3 days at 100° C. under a nitrogen atmosphere, cooled, and the precipitated solid filtered, washed with ether, and dried to afford 1.0 g (75%) of 6-acetamido-4-benzylamino2-methyl-quinoline hydrochloride. A solution of this material (0.76 gm, 2.49 mmol) in 25% hydrochloric acid (12 mL) was heated for 5 hr at 90° C. and subsequently cooled. The precipitated solid was filtered, washed with water, dried at 50° C. under high vacuum for several hours to give 0.38 gm (58%) of 6-amino-4-benzylamino-2-methyl-quinoline. This material was dissolved in glacial acetic acid (3 mL) to which was added dropwise a solution of 2-chlorocinnamoyl chloride in glacial acetic acid over a 5 min period. The reaction mixture was stirred for 1 hr at room temperature and diluted with diethyl ether (25 mL). The solid was filtered, washed with ether, and dried by suction. It was then dissolved in a hot mixture of methanol (50 mL) and water (25 mL), cooled, and 5N sodium hydroxide added to give a yellow precipitate that was filtered, washed with water, and dried under high vacuum. Recrystallization from isopropanol afforded the title compound as pale yellow crystals; yield 0.32 g (52%), m.p. 253-4°, MS (FAB): m/z 428 (M+1).

Workup

  1. temperaturecooled
  2. filtrationthe precipitated solid filtered
  3. washwashed with ether
  4. customdried

Sources & evidence

ORD record
ord-c0ddcff6154b4bf89a314c2b04bbacf5
Source dataset
uspto-grants-1999_07
Patent number
US05919776

Reaction notes

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