N-methyl-2-pyrrolidone → HCID 57876164, compound

HRID 1465406Notes

Reaction equation

HRID 1465406 reaction equation
[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[NH:7][C:6]3[CH2:11][CH2:12][N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1.[OH-].[K+].[CH2:18]([C:21]1[CH:26]=[CH:25][C:24]([CH:27]=[CH2:28])=[CH:23][N:22]=1)[CH2:19][CH3:20].[CH3:29]N1CCCC1=O>O>[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[N:7]([CH2:28][CH2:27][C:24]3[CH:23]=[N:22][C:21]([CH2:18][CH2:19][CH3:20])=[CH:26][CH:25]=3)[C:6]3[CH2:11][CH2:12][N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1.[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[N:7]([CH2:28][CH2:27][C:24]3[CH:23]=[N:22][C:21]([CH:18]([CH3:19])[CH3:29])=[CH:26][CH:25]=3)[C:6]3[CH2:11][CH2:12][N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1

Participants

7

Reactant 4

HCID 13387N-methyl-2-pyrrolidoneHCID 14797Potassium HydroxideHCID 196158-chloro-2-methyl-1H,2H,3H,4H,5H-pyrido(4,3-b)indoleHCID 12201445HCID 12201445, compound

Product 2

HCID 57876164HCID 57876164, compoundYield 9.6%HCID 57876250HCID 57876250, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a solution of 8-Chloro-2-methyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (0.1 g, 0.00045 mol) in N-methyl 2-pyrolidone (1.0 mL) was added powdered potassium hydroxide (0.20 g, 0.0036 mol) and allowed to stir for 10 min at RT. 2-propyl-5-vinyl-pyridine (0.2 g, 0.00136 mol) was added and stirred for further 24 h. at 100° C. After completion (TLC), reaction mixture was diluted with water (10 mL) and extracted with ethyl acetate (3×50 mL). The organic layer was dried over anhydrous sodium sulphate and concentrated under reduced pressure using rotary evaporator. The crude was semi-purified through column chromatography (7% MeOH:DCM in silica 100-200 mesh, Diameter of column—2.5 cm, Height of silica—approx. 5 inch), Then further purified by preparative TLC, to give the desired compound as yellow oil (0.016 g, 9.6% yield), 8-Chloro-5-[2-(6-isopropyl-pyridin-3-yl)-ethyl]-2-methyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (0.016 g, 0.000435 mol) was dissolved in THF (1.0 mL). A solution of oxalic acid dihydrate (0.005 g, 0.0007 mol) in THF (0.5 mL) was added and stirred for 30 min at RT. Precipitate obtained was filtered and dried to give oxalate salt as off white solid (0.010 g, 52% yield).

Workup

  1. stirringstirred for further 24 h. at 100° C
  2. customAfter completion (TLC), reaction mixture
  3. extractionextracted with ethyl acetate (3×50 mL)
  4. dry with materialThe organic layer was dried over anhydrous sodium sulphate
  5. concentrationconcentrated under reduced pressure
  6. customevaporator
  7. customfurther purified by preparative TLC

Sources & evidence

ORD record
ord-1eb34183857a4f3a85df613ece3ef19d
Source dataset
uspto-grants-2015_04
Patent number
US08999978B2

Reaction notes

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