1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 9H-fluorene-2-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amide

HRID 1177886Notes

Reaction equation

HRID 1177886 reaction equation
CCN(C(C)C)C(C)C.[CH:10]1[C:22]2[CH2:21][C:20]3[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=3)[C:14]=2[CH:13]=[CH:12][C:11]=1[C:23]([OH:25])=O.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.Cl.[NH2:48][CH2:49][C:50]([N:52]1[CH2:57][CH2:56][N:55]([C:58](=[O:69])[C:59]2[CH:64]=[CH:63][CH:62]=[CH:61][C:60]=2[C:65]([F:68])([F:67])[F:66])[CH2:54][CH2:53]1)=[O:51]>CN(C=O)C.O>[O:51]=[C:50]([N:52]1[CH2:53][CH2:54][N:55]([C:58](=[O:69])[C:59]2[CH:64]=[CH:63][CH:62]=[CH:61][C:60]=2[C:65]([F:68])([F:67])[F:66])[CH2:56][CH2:57]1)[CH2:49][NH:48][C:23]([C:11]1[CH:12]=[CH:13][C:14]2[C:15]3[C:20](=[CH:19][CH:18]=[CH:17][CH:16]=3)[CH2:21][C:22]=2[CH:10]=1)=[O:25]

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 3485919H-fluorene-2-carboxylic acidHCID 669531782-Amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone hydrochloride

Product 1

HCID 595596689H-fluorene-2-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amideYield 44%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (184 mg, 0.24 mL, 1.42 mmol) was added to a stirred solution of 9H-fluorene-2-carboxylic acid (100 mg, 0.47 mmol) in DMF (2 mL). HOBT (64 mg, 0.47 mmol) and EDCI (109 mg, 0.57 mmol) were then added at room temperature. After 2 minutes 2-amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone hydrochloride salt (167 mg, 0.47 mmol) was added and the resulting mixture was stirred at room temperature overnight. Cold water was then added, filtered the solid precipitated. The solid obtained was recrystallized from a mixture of ethyl acetate and hexane afford 105 mg (43.4%) of 9H-fluorene-2-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amide. LCMS Purity: 98.25%. 1H NMR (DMSO-d6): δ 8.6 (m, 1H), 8.1 (s, 1H), 8.0-7.4 (m, 10H), 4.2 (bs, 2H), 4.0 (s, 2H), 3.8-3.4 (m, 6H), 3.2 (b, 2H).

Workup

  1. filtrationfiltered the solid
  2. customprecipitated
  3. customThe solid obtained
  4. customwas recrystallized from a mixture of ethyl acetate and hexane

Sources & evidence

ORD record
ord-50126fe048884e61ba55b4d479959fa1
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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