Hydrochloric Acid → (E)-N,2-bis(4-hydroxyphenyl)-3-phenylpent-2-enamide

HRID 884056Notes

Reaction equation

HRID 884056 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9](=[O:30])/[C:10](/[C:20]2[CH:25]=[CH:24][C:23]([O:26]COC)=[CH:22][CH:21]=2)=[C:11](/[C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)\[CH2:12][CH3:13])=[CH:4][CH:3]=1.Cl.O>CO.O1CCOCC1>[OH:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9](=[O:30])/[C:10](/[C:20]2[CH:21]=[CH:22][C:23]([OH:26])=[CH:24][CH:25]=2)=[C:11](/[C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)\[CH2:12][CH3:13])=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 962WaterHCID 68732343(E)-N-(4-hydroxyphenyl)-2-(4-(methoxymethoxy)phenyl)-3-phenylpent-2-enamide

Product 1

HCID 42603176(E)-N,2-bis(4-hydroxyphenyl)-3-phenylpent-2-enamideYield 76%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 312751,4-DioxaneSolvent

Procedure

To a solution of 6a (45 mg, 0.112 mmol) in MeOH (1 ml) was added a solution of 4N HCl in dioxane (0.3 ml) under ice cooling, and the mixture was stirred at room temperature for 2 h. H2O was poured into the reaction mixture under ice cooling, and the whole was extracted with AcOEt. The organic layer was washed with brine, dried over Na2SO4, and then concentrated. The residue was crystallized with Et2O to give 7a (76%). 7a: colorless powder; 1H-NMR (CD3OD) δ 0.97 (3H, t, J=7.5 Hz), 2.64 (2H, q, J=7.5 Hz), 6.51 (2H, d, J=8.8 Hz), 6.76 (2H, d, J=8.8 Hz), 6.92 (2H, d, J=8.8 Hz), 7.12-7.25 (5H, m), 7.40 (2H, d, J=8.8 Hz). HRMS calcd for C23H22NO3: 360.1600. Found: 360.1605.

Workup

  1. extractionthe whole was extracted with AcOEt
  2. washThe organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customThe residue was crystallized with Et2O

Sources & evidence

ORD record
ord-02f0ebc8d17a4d32bf800f77e64a17e5
Source dataset
uspto-grants-2012_08
Patent number
US08236987B2

Reaction notes

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