Sodium Hydroxide → 5,7-dihydro-2-[[(4-methoxy-5-methyl-2-pyridyl)methyl]thio]-5,5,7,7-tetramethylindeno[5,6-d]imidazol-6(1H)-one

HRID 703180Notes

Reaction equation

HRID 703180 reaction equation
[SH:1][C:2]1[NH:6][C:5]2[CH:7]=[C:8]3[C:12](=[CH:13][C:4]=2[N:3]=1)[C:11]([CH3:15])([CH3:14])[C:10](=[O:16])[C:9]3([CH3:18])[CH3:17].Cl.Cl[CH2:21][C:22]1[CH:27]=[C:26]([O:28][CH3:29])[C:25]([CH3:30])=[CH:24][N:23]=1.[OH-].[Na+]>O>[CH3:29][O:28][C:26]1[C:25]([CH3:30])=[CH:24][N:23]=[C:22]([CH2:21][S:1][C:2]2[NH:3][C:4]3[CH:13]=[C:12]4[C:8](=[CH:7][C:5]=3[N:6]=2)[C:9]([CH3:18])([CH3:17])[C:10](=[O:16])[C:11]4([CH3:14])[CH3:15])[CH:27]=1

Participants

5

Reactant 3

HCID 14798Sodium HydroxideHCID 221514312-(Chloromethyl)-4-methoxy-5-methylpyridine hydrochlorideHCID 178429018HCID 178429018, compound

Product 1

HCID 202230585,7-dihydro-2-[[(4-methoxy-5-methyl-2-pyridyl)methyl]thio]-5,5,7,7-tetramethylindeno[5,6-d]imidazol-6(1H)-one

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

7.8 g of 5,7-dihydro-2-mercapto-5,5,7,7-tetramethylindeno[5,6-d]imidazol-6(lH)-one were suspended in 200 ml of alcohol and the suspension was treated while cooling with ice with 6.3 g of 2-chloromethyl-4-methoxy-5-methylpyridine hydrochloride. Thereafter, 2.4 g of sodium hydroxide in 100 ml of water were added dropwise thereto, the mixture was left to boil at reflux overnight and subsequently evaporated to dryness in vacuo. The residue was dissolved in 500 ml of methylene chloride. The solution was washed firstly with 250 ml of 1.5N sodium hydroxide solution and then with 3×250 ml of water, dried over ium sulfate and evaporated in vacuo. The product was purified on 150 g of silica gel with ethyl acetate/methylene chloride (1:1) as the elution agent. Crystallization from methylene chloride/petroleum ether gave 5.7-dihydro-2-[[(4-methoxy-5-methyl-2-pyridyl)methyl]thio]-5,5,7,7-tetramethylindeno[5,6-d]imidazol-6(lH)-one of melting point 204-205° .

Workup

  1. additionthe suspension was treated
  2. waitthe mixture was left
  3. temperatureat reflux overnight
  4. customsubsequently evaporated to dryness in vacuo
  5. dissolutionThe residue was dissolved in 500 ml of methylene chloride
  6. washThe solution was washed firstly with 250 ml of 1.5N sodium hydroxide solution
  7. dry with materialwith 3×250 ml of water, dried over ium sulfate
  8. customevaporated in vacuo
  9. customThe product was purified on 150 g of silica gel with ethyl acetate/methylene chloride (1:1) as the elution agent
  10. customCrystallization from methylene chloride/petroleum ether

Sources & evidence

ORD record
ord-8b2484310746451e92626cc94430139c
Source dataset
uspto-grants-1991_01
Patent number
US04981861

Reaction notes

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