2,4-Dichlorobenzaldehyde → HCID 86610813, compound

HRID 564036Notes

Reaction equation

HRID 564036 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-215c7a7174dc40d88115f33814754646
Source dataset
uspto-grants-2011_11
Patent number
US08067619B2

Reaction notes

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