Methylamine → 5-(4-(4-cyanophenyl)piperidine-1-carbonyl)-2-cyclobutyl-N,4-dimethylbenzamide

HRID 541401Notes

Reaction equation

HRID 541401 reaction equation
[C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH:9]2[CH2:14][CH2:13][N:12]([C:15]([C:17]3[C:18]([CH3:30])=[CH:19][C:20]([CH:26]4[CH2:29][CH2:28][CH2:27]4)=[C:21]([CH:25]=3)[C:22](O)=[O:23])=[O:16])[CH2:11][CH2:10]2)=[CH:5][CH:4]=1)#[N:2].C[CH2:32][N:33]=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.C(N(C(C)C)CC)(C)C.CN>CN(C=O)C.C(OCC)(=O)C.CO.C(OCC)(=O)C>[C:1]([C:3]1[CH:4]=[CH:5][C:6]([CH:9]2[CH2:10][CH2:11][N:12]([C:15]([C:17]3[C:18]([CH3:30])=[CH:19][C:20]([CH:26]4[CH2:27][CH2:28][CH2:29]4)=[C:21]([CH:25]=3)[C:22]([NH:33][CH3:32])=[O:23])=[O:16])[CH2:13][CH2:14]2)=[CH:7][CH:8]=1)#[N:2]

Participants

9

Reactant 5

HCID 6329MethylamineHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 682882755-(4-(4-Cyanophenyl)piperidine-1-carbonyl)-2-cyclobutyl-4-methylbenzoic acid2×

Product 1

HCID 665460165-(4-(4-cyanophenyl)piperidine-1-carbonyl)-2-cyclobutyl-N,4-dimethylbenzamideYield 55%

Reagents, catalysts & solvents 3

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolventHCID 21584119Ethylacetate methanolSolvent

Procedure

To a solution of 5-(4-(4-cyanophenyl)piperidine-1-carbonyl)-2-cyclobutyl-4-methylbenzoic acid (compound 234, 50 mg, 0.124 mmol) in DMF (2 mL) were added EDCI (36 mg, 0.186 mmol), HOBt (10 mg, 0.5 mmol), diisopropylethyl amine (54 mg, 0.434 mmol), and methyl amine (125 ul, 2.5 M in THF). The reaction mixture was stirred for 12 hours at room temperature and quenched with saturated aqueous NaHCO3 (50 mL). After extraction with ethyl acetate (2×50 mL), the combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo. Purification via SiO2 flash chromatography with ethyl acetate to ethyl acetate/methanol=98/2 afforded 5-(4-(4-cyanophenyl)piperidine-1-carbonyl)-2-cyclobutyl-N,4-dimethylbenzamide (28.3 mg, 55% yield) as a white solid. m/z (ES+) 416 (M+H)+. 1H NMR (400 MHz, DMSO-d6): δ 8.13 (q, J=4.5 Hz, 1H), 7.77 (d, J=8.3 Hz, 2H), 7.55-7.45 (m, 2H), 7.26 (br s, 1H), 7.12 & 6.99 (2 singlets, amide rotamers, Ar—H, 1H), 4.70 (br d, J=11.9 Hz, 1H), 3.86-3.72 (m, 1H), 3.50-3.35 (m, 1H), 3.13 (t with fine structure, J=12.3 Hz, 1H), 2.99-2.78 (m, 2H), 2.72 (d, J=4.6 Hz, 3H), 2.39-2.17 (m, 5H), 2.17-1.98 (m, 2H), 1.98-1.81 (m, 2H), 1.81-1.35 (m, 4H).

Workup

  1. customquenched with saturated aqueous NaHCO3 (50 mL)
  2. extractionAfter extraction with ethyl acetate (2×50 mL)
  3. dry with materialthe combined organic layers were dried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-de43bbd53b7742beb07d79e132eea57b
Source dataset
uspto-grants-2014_10
Patent number
US08871790B2

Reaction notes

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