Triethylamine → 3-(cyclopentyloxy)-N-(2,6-difluorophenyl)-4-methoxybenzamide

HRID 1584897Notes

Reaction equation

HRID 1584897 reaction equation
[F:1][C:2]1[CH:8]=[CH:7][CH:6]=[C:5]([F:9])[C:3]=1[NH2:4].C(N(CC)CC)C.[CH:17]1([O:22][C:23]2[CH:24]=[C:25]([CH:29]=[CH:30][C:31]=2[O:32][CH3:33])[C:26](Cl)=[O:27])[CH2:21][CH2:20][CH2:19][CH2:18]1>ClCCl>[F:1][C:2]1[CH:8]=[CH:7][CH:6]=[C:5]([F:9])[C:3]=1[NH:4][C:26](=[O:27])[C:25]1[CH:29]=[CH:30][C:31]([O:32][CH3:33])=[C:23]([O:22][CH:17]2[CH2:18][CH2:19][CH2:20][CH2:21]2)[CH:24]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 796472,6-DifluoroanilineHCID 27946003-(Cyclopentyloxy)-4-methoxybenzoyl chloride

Product 1

HCID 97983363-(cyclopentyloxy)-N-(2,6-difluorophenyl)-4-methoxybenzamideYield 46.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A stirred solution of 2,6-difluoroaniline (1.52 g) and triethylamine (1.19 g) in dichloromethane (50 mL) at room temperature is treated dropwise with a solution of 3-cyclopentyloxy-4-methoxybenzoyl chloride (3.0 g), that is prepared as described hereinafter in Reference Example 3) in dichloromethane (50 mL). The solution is stirred and heated at reflux for 4 hours, then it is cooled, washed with water and dried over magnesium sulfate. The solution is concentrated and the resulting residue is recrystallized from ethyl acetate, to give N-(2,6-difluorophenyl)-3-cyclopentyloxy-4-methoxybenzamide (1.9 g), m.p. 158-160° C. [NMR(CDCl3): 1.55-1.7(m,3H),1.8-2.05(m,5H),3.93(s,3H),4.85(m,1H), 6.9(d,1H),6.95-7.03(m,2H),7.2-7.3(m,1H),7.35(bs,1H), 7.45(q,1H),7.53(d,1H); Elemental analysis: C,65.1; H,5.6;F,10.4; N,4.2%; Calculated: C,65.7; H,5.5;F,10.9;N,4.0%].

Workup

  1. customis prepared
  2. temperatureheated
  3. temperatureat reflux for 4 hours
  4. temperatureit is cooled
  5. washwashed with water
  6. dry with materialdried over magnesium sulfate
  7. concentrationThe solution is concentrated
  8. customthe resulting residue is recrystallized from ethyl acetate

Sources & evidence

ORD record
ord-3f53b0418fdf4a81a41ad54b5c1c8cd2
Source dataset
uspto-grants-1999_08
Patent number
US05935978

Reaction notes

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