Triethylamine → Benzyl 2-chloro-2-(3,4-dimethoxyphenyl)acetate

HRID 1438178Notes

Reaction equation

HRID 1438178 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11](O)[C:12]([O:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[O:13])[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C(N(CC)CC)C.S([Cl:34])(C)(=O)=O>C(Cl)Cl>[Cl:34][CH:11]([C:5]1[CH:6]=[CH:7][C:8]([O:9][CH3:10])=[C:3]([O:2][CH3:1])[CH:4]=1)[C:12]([O:14][CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)=[O:13]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 57448185Benzyl 2-(3,4-dimethoxyphenyl)-2-hydroxyacetate

Product 1

HCID 57448186Benzyl 2-chloro-2-(3,4-dimethoxyphenyl)acetateYield 56%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To 137D (450 mg, 1.5 mmol) in CH2Cl2 (5 mL) at 0° C. was added triethylamine (0.42 mL, 3.0 mmol) followed by mesyl chloride (0.14 mL, 1.8 mmol). After stirring at rt overnight, the reaction was concentrated and purified via silica gel chromatography (0-25% ethyl acetate/hexanes) to provide 137E (268 mg, 56%). 1H NMR (400 MHz, Methanol-d4) δ ppm 3.81 (s, 3H) 3.87 (s, 3H) 5.19 (m, 2H) 5.36 (s, 1H) 6.81 (d, J=8.35 Hz, 1H) 6.93-7.07 (m, 2H) 7.20-7.42 (m, 5H).

Workup

  1. concentrationthe reaction was concentrated
  2. custompurified via silica gel chromatography (0-25% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-ed91220a61e54dd696d95d18e0200e66
Source dataset
uspto-grants-2009_11
Patent number
US07622585B2

Reaction notes

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