Acetic Anhydride → n-[4-(1-Ethyl-propylamino)-6-methyl-2-(2,4,6-trimethyl-phenoxy)-pyridin-3-yl]-acetamide

HRID 967976Notes

Reaction equation

HRID 967976 reaction equation
[CH3:1][C:2]1[CH:22]=[C:21]([CH3:23])[CH:20]=[C:19]([CH3:24])[C:3]=1[O:4][C:5]1[C:10]([NH2:11])=[C:9]([NH:12][CH:13]([CH2:16][CH3:17])[CH2:14][CH3:15])[CH:8]=[C:7]([CH3:18])[N:6]=1.[C:25](OC(=O)C)(=[O:27])[CH3:26].C(N(CC)CC)C>C(Cl)Cl>[CH2:14]([CH:13]([NH:12][C:9]1[CH:8]=[C:7]([CH3:18])[N:6]=[C:5]([O:4][C:3]2[C:19]([CH3:24])=[CH:20][C:21]([CH3:23])=[CH:22][C:2]=2[CH3:1])[C:10]=1[NH:11][C:25](=[O:27])[CH3:26])[CH2:16][CH3:17])[CH3:15]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 219121512-(2,4,6-trimethylphenoxy)-N4-(1-ethylpropyl)-6-methyl-pyridine-3,4-diamine

Product 1

HCID 53966610n-[4-(1-Ethyl-propylamino)-6-methyl-2-(2,4,6-trimethyl-phenoxy)-pyridin-3-yl]-acetamideYield 89%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A mixture of 2-(2,4,6-trimethyl-phenoxy)-N4-(1-ethyl-propyl)-6-methyl-pyridine-3,4-diamine (250 mg, 0.763 mmol), acetic anhydride (72 mg, 0.763 mmol) and triethylamine (77 mg, 0.763 mmol) in 5 ml of methylene chloride was stirred at room temperature for 3 hours. The mixture was quenched with water and extracted with ethyl acetate. The organic layer was dried and concentrated to dryness to give 310 mg of the crude material. The crude material was purified through silica gel column chromatography using 2% methanol in chloroform as eluent to give 250 mg (89% yield) of N-[4-(1-ethyl-propylamino)-6-methyl-2-(2,4,6-trimethyl-phenoxy)-pyridin-3-yl]-acetamide as tan solid, mp 154-156° C. 1H NMR (CDCl3) δ 6.97 (0.64H), 6.86 (s, 2H), 6.26 (0.36H), 6.14 (0.64H), 6.12 (s, 0.36H), 4.80 (d, 0.64H), 4.40 (d, 0.36H), 3.2-3.4 (m, 1H), 2.29 (s, 3H), 2.26 (s, 1.9H), 2.17 (s, 1.1H), 2.16 (s, 1.9H), 2.06 (s, 6H), 1.99 (s, 1.1H), 1.4-1.75 (m, 4H), 0.97 (t, 6H) ppm.

Workup

  1. customThe mixture was quenched with water
  2. extractionextracted with ethyl acetate
  3. customThe organic layer was dried
  4. concentrationconcentrated to dryness
  5. customto give 310 mg of the crude material
  6. customThe crude material was purified through silica gel column chromatography

Sources & evidence

ORD record
ord-fd78d3ebae30462ca5086e6e9daecc59
Source dataset
uspto-grants-2005_10
Patent number
US06956047B1

Reaction notes

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