2,4-Dichlorobenzaldehyde → HCID 86610813, compound

HRID 1444802Notes

Reaction equation

HRID 1444802 reaction equation
[CH3:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([C:12]#[N:13])[CH:10]=2)[O:5][C:4](=[O:14])[CH:3]=1.[Li+].C[Si]([N-][Si](C)(C)C)(C)C.[Cl:25][C:26]1[CH:33]=[C:32]([Cl:34])[CH:31]=[CH:30][C:27]=1[CH:28]=[O:29]>C1COCC1>[Cl:25][C:26]1[CH:33]=[C:32]([Cl:34])[CH:31]=[CH:30][C:27]=1[CH:28]([OH:29])[CH2:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([C:12]#[N:13])[CH:10]=2)[O:5][C:4](=[O:14])[CH:3]=1

Participants

5

Reactant 3

HCID 134042,4-DichlorobenzaldehydeHCID 2733832Lithium HexamethyldisilazideHCID 86610812HCID 86610812, compound

Product 1

HCID 86610813HCID 86610813, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 4-methyl-2-oxo-2H-chromene-6-carbonitrile (56 mg, 0.325 mmol) in dry THF (12 mL) at −20° C. was added drop wise 1.0 M LiHMDS solution in THF (0.6 mL). After 30 minutes 2,4-dichlorobenzaldehyde (105 mg) was added into the reaction mixture and the reaction mixture was stirred for 1 hour. The reaction mixture was then quenched with saturated aqueous ammonium chloride (10 mL) and extracted with ethyl acetate (50 mL). The organic layer was separated and dried over sodium sulfate, then concentrated and purified on silica gel eluted with 30%-60% ethyl acetate in hexanes to yield 4-[2-(2,4-dichloro-phenyl)-2-hydroxy-ethyl]-2-oxo-2H-chromene-6-carbonitrile as a white powder.

Workup

  1. customThe reaction mixture was then quenched with saturated aqueous ammonium chloride (10 mL)
  2. extractionextracted with ethyl acetate (50 mL)
  3. customThe organic layer was separated
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated
  6. custompurified on silica gel
  7. washeluted with 30%-60% ethyl acetate in hexanes

Sources & evidence

ORD record
ord-44b65971521f42d9bfbba7a8310c730f
Source dataset
uspto-grants-2010_02
Patent number
US07662975B2

Reaction notes

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