2,4-Dimethylaniline → 3(RS)-(tert-butoxyformamido)-5,5,5-trifluoro-2(RS)-hydroxy-2',4' dimethylvaleranilide

HRID 635623Notes

Reaction equation

HRID 635623 reaction equation
[C:1]([O:5][C:6]([NH:8][CH:9]([CH2:15][C:16]([F:19])([F:18])[F:17])[CH:10]([OH:14])[C:11]([OH:13])=O)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:20][C:21]1[CH:27]=[C:26]([CH3:28])[CH:25]=[CH:24][C:22]=1[NH2:23].Cl.CN(C)CCCN=C=NCC.ON1C2C=CC=CC=2N=N1>ClCCl.C(OCC)C>[C:1]([O:5][C:6]([NH:8][CH:9]([CH2:15][C:16]([F:19])([F:18])[F:17])[CH:10]([OH:14])[C:11]([NH:23][C:22]1[CH:24]=[CH:25][C:26]([CH3:28])=[CH:27][C:21]=1[CH3:20])=[O:13])=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

7

Reactant 4

HCID 72502,4-DimethylanilineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 212588903(RS)-(tert-butoxyformamido)-5,5,5-trifluoro-2(RS)-hydroxyvaleric acid

Product 1

HCID 212589493(RS)-(tert-butoxyformamido)-5,5,5-trifluoro-2(RS)-hydroxy-2',4' dimethylvaleranilideYield 93%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 287 mg (1 mmol) of 3(RS)-(tert-butoxyformamido)-5,5,5-trifluoro-2(RS)-hydroxyvaleric acid, 363 mg (3 mmol) of 2,4-dimethylaniline, 288 mg (1.5 mmol) of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 150 mg (1.1 mmol) of 1-hydroxybenzotriazole in 10 ml of dichloromethane was stirred at room temperature for 2 hours. The solution was diluted with diethyl ether, washed with 2M hydrochloric acid and saturated sodium bicarbonate solution and then dried over anhydrous magnesium sulphate, filtered and evaporated to give 363 mg of 3(RS)-(tert-butoxyformamido)-5,5,5-trifluoro-2(RS)-hydroxy-2′,4′ dimethylvaleranilide as a white solid, 1H NMR (250 MHz, CDC3) δ: 1.4 (s,4H), 1.45 (s,5H), 2.1 (s,1.5H), 2.15 (s, 1.5H), 2.3 (s,3H), 2.2-2.6 (m,1H), 2.7-3(m,1H), 4.2-4.6 (m,2H), 5.3 (d,0.5H), 5.6 (d,0.5H), 5.9 (d,0.5H), 6.2 (d,0.5H), 7.0 (m,2H), 7.6 (d,0.5H), 7.7 (d,0.5H), 8.6 (s,1H).

Workup

  1. washwashed with 2M hydrochloric acid and saturated sodium bicarbonate solution
  2. dry with materialdried over anhydrous magnesium sulphate
  3. filtrationfiltered
  4. customevaporated

Sources & evidence

ORD record
ord-b4fd8769765d427494131c74ee654c28
Source dataset
uspto-grants-2001_02
Patent number
US06187905B1

Reaction notes

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