Water → 1-[3-(4-phenyl-1,2,3,6-tetrahydro-1-pyridyl)propyl]-5,6-dihydro(1H,4H)-1,2,5-thiadiazolo[4,3,2-ij]quinoline 2,2-dioxide

HRID 654094Notes

Reaction equation

HRID 654094 reaction equation
[NH:1]1[C:11]2=[C:12]3[C:7](=[CH:8][CH:9]=[CH:10]2)[CH2:6][CH2:5][CH2:4][N:3]3[S:2]1(=[O:14])=[O:13].[H-].[Na+].Cl[CH2:18][CH2:19][CH2:20][N:21]1[CH2:26][CH:25]=[C:24]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[CH2:23][CH2:22]1.O>CN(C)C=O.C(OCC)(=O)C>[C:27]1([C:24]2[CH2:25][CH2:26][N:21]([CH2:20][CH2:19][CH2:18][N:1]3[C:11]4=[C:12]5[C:7](=[CH:8][CH:9]=[CH:10]4)[CH2:6][CH2:5][CH2:4][N:3]5[S:2]3(=[O:13])=[O:14])[CH2:22][CH:23]=2)[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1

Participants

7

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 98375831-(3-Chloropropyl)-4-phenyl-1,2,3,6-tetrahydropyridineHCID 156467015,6-dihydro(1H,4H)-1,2,5-thiadiazolo[4,3,2-ij]quinoline 2,2-dioxide

Product 1

HCID 198884551-[3-(4-phenyl-1,2,3,6-tetrahydro-1-pyridyl)propyl]-5,6-dihydro(1H,4H)-1,2,5-thiadiazolo[4,3,2-ij]quinoline 2,2-dioxideYield 73.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolvent3×HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

A solution of 5,6-dihydro(1H,4H)-1,2,5-thiadiazolo[4,3,2-ij]quinoline 2,2-dioxide (2.6 g) in dry N,N-dimethylformamide (10 cc) is added dropwise to a suspension of sodium hydride (0.45 g, 80% suspension in oil) in N,N-dimethylformamide (20 cc). After 15 minutes, stirring, a solution of 1-(3-chloropropyl)-4-phenyl-1,2,3,6-tetrahydropyridine (3.51 g) in N,N-dimethylformamide (10 cc) is added. The reaction mixture is heated to 80° C. for 90 minutes and is then cooled and poured into a mixture of water (100 cc) and ethyl acetate (200 cc). The organic phase is washed with water, is dried over magnesium sulphate and is concentrated to dryness under reduced pressure (2.7 kPa). The residue is chromatographed on a column of silica gel (0.2-0.063-mm particle size, 4-cm diameter, 50-cm height) with ethyl acetate as eluent and with 125-cc fractions being collected. Fractions 2 to 6 are combined and concentrated to dryness under reduced pressure (2.7 kPa). After recrystallization from ethyl acetate, 1-[3-(4-phenyl-1,2,3,6-tetrahydro-1-pyridyl)propyl]-5,6-dihydro(1H,4H)-1,2,5-thiadiazolo[4,3,2-ij]quinoline 2,2-dioxide (3.7 g) is obtained, melting at 120° C.

Workup

  1. temperatureis then cooled
  2. washThe organic phase is washed with water
  3. dry with materialis dried over magnesium sulphate
  4. concentrationis concentrated to dryness under reduced pressure (2.7 kPa)
  5. customThe residue is chromatographed on a column of silica gel (0.2-0.063-mm particle size, 4-cm diameter, 50-cm height) with ethyl acetate as eluent and with 125-cc fractions
  6. custombeing collected
  7. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)
  8. customAfter recrystallization from ethyl acetate

Sources & evidence

ORD record
ord-30c78a9ecb3b465e870e95039fae0294
Source dataset
uspto-grants-1992_07
Patent number
US05130313

Reaction notes

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