p-Toluenesulfonic acid → 4-(4-Hydroxy-4-methylpent-2-ynoyl)benzonitrile

HRID 1842396Notes

Reaction equation

HRID 1842396 reaction equation
[CH3:1][C:2]([O:16][Si](C)(C)C)([CH3:15])[C:3]#[C:4][C:5]([C:7]1[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][CH:8]=1)=[O:6].CC1C=CC(S(O)(=O)=O)=CC=1>C(Cl)Cl.O>[OH:16][C:2]([CH3:15])([CH3:1])[C:3]#[C:4][C:5]([C:7]1[CH:8]=[CH:9][C:10]([C:11]#[N:12])=[CH:13][CH:14]=1)=[O:6]

Participants

5

Reactant 2

HCID 6101p-Toluenesulfonic acidHCID 66643970HCID 66643970, compound

Product 1

HCID 666439664-(4-Hydroxy-4-methylpent-2-ynoyl)benzonitrileYield 112.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of 4-(4-methyl-4-(trimethylsilyloxy)pent-2-ynoyl)benzonitrile (1.7 g, 5.00 mmol) in DCM (15 mL) was added PTSA (1.70 g, 8.90 mmol) at RT and the reaction mixture was stirred for 30 min. The reaction mixture was diluted with water (10 mL) and extracted with DCM (2×50 mL). The combined organic layers were washed with a saturated NaHCO3 solution and water, dried over Na2SO4, filtered, and then concentrated in vacuo to afford 4-(4-hydroxy-4-methylpent-2-ynoyl)benzonitrile (1.20 g) as a yellow oil.

Workup

  1. extractionextracted with DCM (2×50 mL)
  2. washThe combined organic layers were washed with a saturated NaHCO3 solution and water
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-14a02ac2850848d49dda9821c9801fe8
Source dataset
uspto-grants-2015_02
Patent number
US08946222B2

Reaction notes

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