Ethylene Glycol → 2,4-Dichloro-6-(3-[1,3]dioxolan-2-yl-5-methyl-phenoxy)-5-isopropyl-pyrimidine

HRID 426102Notes

Reaction equation

HRID 426102 reaction equation
[Cl:1][C:2]1[N:7]=[C:6]([O:8][C:9]2[CH:10]=[C:11]([CH:14]=[C:15]([CH3:17])[CH:16]=2)[CH:12]=[O:13])[C:5]([CH:18]([CH3:20])[CH3:19])=[C:4]([Cl:21])[N:3]=1.[CH2:22](O)[CH2:23][OH:24].C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1.CC(=O)OCC>[Cl:1][C:2]1[N:3]=[C:4]([Cl:21])[C:5]([CH:18]([CH3:19])[CH3:20])=[C:6]([O:8][C:9]2[CH:16]=[C:15]([CH3:17])[CH:14]=[C:11]([CH:12]3[O:24][CH2:23][CH2:22][O:13]3)[CH:10]=2)[N:7]=1

Participants

6

Reactant 3

HCID 174Ethylene GlycolHCID 6101p-Toluenesulfonic acidHCID 591846443-(2,6-Dichloro-5-isopropyl-pyrimidin-4-yloxy)-5-methyl-benzaldehyde

Product 1

HCID 591847212,4-Dichloro-6-(3-[1,3]dioxolan-2-yl-5-methyl-phenoxy)-5-isopropyl-pyrimidineYield 92.3%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of (6) (1.71 g, 5.25 mmol), ethylene glycol (0.88 ml, 15.75 mmol), and p-toluenesulfonic acid (263 mg, 0.26 mmol) in toluene (20 ml) was refluxed for 3 hr., using a reflux condenser equipped with a Dean-Stark trap. After cooling to room temperature, the mixture was diluted with EA, washed with aqueous saturated sodium bicarbonate solution, dried with anhydrous magnesium sulfate, filtered, and evaporated in vacuo. The residue was purified by silica gel column chromatography (eluent, EA:hexanes (1:15)) to afford 1.79 g (92%) of a colorless syrup; 1H NMR (200 MHz, CDCl3) δ 1.40 (6H, d, J=7.0 Hz), 2.40 (3H, s), 3.58 (1H, m), 3.99-4.16 (4H, m), 5.82 (1H, s), 6.92 (1H, s), 7.03 (1H, s), 7.21 (1H, s).

Workup

  1. temperaturewas refluxed for 3 hr
  2. customequipped with a Dean-Stark trap
  3. washwashed with aqueous saturated sodium bicarbonate solution
  4. dry with materialdried with anhydrous magnesium sulfate
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customThe residue was purified by silica gel column chromatography (eluent, EA:hexanes (1:15))

Sources & evidence

ORD record
ord-09cff354850d49509f34776bf3ade69a
Source dataset
uspto-grants-2012_01
Patent number
US08106064B2

Reaction notes

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