Sodium hydride → HCID 19612613, compound

HRID 1898966Notes

Reaction equation

HRID 1898966 reaction equation
[H-].[Na+].[CH3:3][C:4]1[S:8][C:7]([CH2:9][CH2:10][CH2:11][OH:12])=[CH:6][CH:5]=1.Cl[C:14]1[C:18]([C:19]2[CH:20]=[N:21][CH:22]=[CH:23][CH:24]=2)=[N:17][S:16][N:15]=1>C1COCC1>[CH3:3][C:4]1[S:8][C:7]([CH2:9][CH2:10][CH2:11][O:12][C:14]2[C:18]([C:19]3[CH:20]=[N:21][CH:22]=[CH:23][CH:24]=3)=[N:17][S:16][N:15]=2)=[CH:6][CH:5]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 104881643-Chloro-4-(pyridin-3-yl)-1,2,5-thiadiazoleHCID 12862889HCID 12862889, compound

Product 1

HCID 19612613HCID 19612613, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

Sodium hydride (10.2 mmol) was added to a solution of 3-(5-methyl-2-thienyl)-1-propanol (4.0 g, 25.5 mmol) in THF (40 ml). The mixture was stirred for 1 h at room temperature, whereupon a solution of 3-(3-chloro-1,2,5-thiadiazol-4yl)pyridine (EP 0384288) (1.0 g, 5.1 mmol) in THF (10 ml) was added dropwise to the reaction mixture. After stirring overnight at room temperature, the reaction was quenched with water then extracted with diethyl ether. The organic phase was dried over NaCl Na2SO4 then evaporated to yield crude 3-(3-(5-methyl-2-thienyl)propoxy-1,2,5-thiadiazol-4-yl)pyridine. A solution of 3-(3-(5-methyl-2-thienyl)propoxy-1,2,5-thiadiazol-4-yl)pyridine (1.0 g, 3.2 mmol) and iodomethane (2.3 g, 16.0 mmol) in 60 ml of acetone was refluxed overnight. The solution was evaporated to yield 1.5 g of the quaternized product. Sodium borohydride (0.6 g, 16.0 mmol) was carefully added to a solution of the quaternized product (1.5 g) in ethanol (30 ml). The reaction was evaporated and the resulting residue was taken up in water and extracted with methylene chloride (3×100 ml). The organic phase was dried over NaCl/Na2SO4 then evaporated. The residue was purified by radial chromatography eluting with 0.5% NH4OH/5.0% EtOH in CHCl3. The oxalate salt was made to yield 337 mg of the title compound. M.p. 134°-137° C. (Compound 62).

Workup

  1. additionwas added dropwise to the reaction mixture
  2. customthe reaction was quenched with water
  3. extractionthen extracted with diethyl ether
  4. dry with materialThe organic phase was dried over NaCl Na2SO4
  5. customthen evaporated

Sources & evidence

ORD record
ord-a7633a29f56a4eee95e4819f16c5ea23
Source dataset
uspto-grants-1996_11
Patent number
US05571826

Reaction notes

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