Diethylamine → HCID 68994690, compound

HRID 1987998Notes

Reaction equation

HRID 1987998 reaction equation
Cl[CH2:2][C:3]1[O:4][C:5]2[C:6](=[C:8]([C:12]([O:14][CH3:15])=[O:13])[CH:9]=[CH:10][CH:11]=2)[N:7]=1.[CH2:16]([NH:18][CH2:19][CH3:20])[CH3:17]>C1COCC1>[CH2:16]([N:18]([CH2:2][C:3]1[O:4][C:5]2[C:6](=[C:8]([C:12]([O:14][CH3:15])=[O:13])[CH:9]=[CH:10][CH:11]=2)[N:7]=1)[CH2:19][CH3:20])[CH3:17]

Participants

4

Reactant 2

HCID 8021DiethylamineHCID 689963151006601-77-9

Product 1

HCID 68994690HCID 68994690, compoundYield 64.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of methyl 2-(chloromethyl)benzoxazole-4-carboxylate (267 mg, 1.18 mmol) and diethylamine (2.0 mL, 27.4 mmol) in THF (15 mL) was stirred at ambient temperature overnight. The solvent was removed under reduced pressure and the residue was purified by column chromatography (silica gel, 10:1:0.1 dichloromethane/methanol/concentrated ammonium hydroxide), followed by purification by preparative TLC (silica gel, 10:1:0.1 dichloromethane/methanol/concentrated ammonium hydroxide) to afford methyl 2-(diethylaminomethyl)benzoxazole-4-carboxylate (200 mg, 64%) as a yellow oil: 1H NMR (300 MHz, CDCl3) δ 7.99 (dd, J=9.0, 1.0 Hz, 1H), 7.74 (dd, J=9.0, 1.0 (1H), 6.40 (t, J=8.1 Hz, 1H), 4.09 (s, 2H), 4.04 (s, 3H), 2.74-2.69 (m, 4H), 1.13 (t, J=6.6 Hz, 1H); MS (ESI+) m/z 263 (M+H).

Workup

  1. customThe solvent was removed under reduced pressure
  2. customthe residue was purified by column chromatography (silica gel, 10:1:0.1 dichloromethane/methanol/concentrated ammonium hydroxide)
  3. customfollowed by purification by preparative TLC (silica gel, 10:1:0.1 dichloromethane/methanol/concentrated ammonium hydroxide)

Sources & evidence

ORD record
ord-6e99bb2c0c93464b936a78ad64cd409e
Source dataset
uspto-grants-2009_06
Patent number
US07553846B2

Reaction notes

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