Triethylamine → (+/-)-4-(4-Bromophenyl)-2-methyl-2-(methylsulfonyl)-N-(tetrahydro-2H-pyran-2-yloxy)butanamide

HRID 533501Notes

Reaction equation

HRID 533501 reaction equation
C(N(CC)CC)C.N1(O)C2C=CC=CC=2N=N1.[Br:18][C:19]1[CH:24]=[CH:23][C:22]([CH2:25][CH2:26][C:27]([CH3:35])([S:31]([CH3:34])(=[O:33])=[O:32])[C:28]([OH:30])=O)=[CH:21][CH:20]=1.[O:36]1[CH2:41][CH2:40][CH2:39][CH2:38][CH:37]1[O:42][NH2:43].Cl.C(N=C=NCCCN(C)C)C>ClCCl>[Br:18][C:19]1[CH:20]=[CH:21][C:22]([CH2:25][CH2:26][C:27]([CH3:35])([S:31]([CH3:34])(=[O:33])=[O:32])[C:28]([NH:43][O:42][CH:37]2[CH2:38][CH2:39][CH2:40][CH2:41][O:36]2)=[O:30])=[CH:23][CH:24]=1

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 5142091O-(Tetrahydropyran-2-yl)hydroxylamineHCID 66577906(+/-)-4-(4-Bromophenyl)-2-methyl-2-(methylsulfonyl)butanoic acid

Product 1

HCID 76445393(+/-)-4-(4-Bromophenyl)-2-methyl-2-(methylsulfonyl)-N-(tetrahydro-2H-pyran-2-yloxy)butanamideYield 76.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Triethylamine (5.49 g, 54.3 mmol) and 1H-benzo[d][1,2,3]triazol-1-ol (7.5 g, 49 mmol) were added to a solution of the (+/−)-4-(4-bromophenyl)-2-methyl-2-(methylsulfonyl)butanoic acid (9.1 g, 27.1 mmol) in dichloromethane (100 mL). After 10 minutes O-tetrahydro-2H-pyran-2yl-hydroxylamine (4.6 g, 39 mmol) was added followed by N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine hydrochloride (EDCI) (7.2 g, 38 mmol). After 12 h the reaction was quenched by the addition of saturated aqueous NaHCO3. The layers were separated and the organic layer was dried (Na2SO4), filtered and concentrated in vacuo. Purification by flash column chromatography on silica gel (hexanes/ethyl acetate 7:3-6:4) afforded the title compound as a white solid (9.0 g, 76%). LCMS m/z 434.1 (M+1) 1H NMR (400 MHz, DMSO-d6) δ ppm 1.54 (d, J=3.90 Hz, 6H) 1.69 (br. s., 3H) 1.78-2.06 (m, 1H) 2.27-2.55 (m, 2H) 2.59-2.72 (m, 1H) 3.03 (d, J=6.64 Hz, 3H) 3.50 (d, J=11.32 Hz, 1H) 3.95-4.22 (m, 1H) 4.97 (d, J=9.37 Hz, 1H) 7.22 (dd, J=8.39, 4.49 Hz, 2H) 7.49 (d, J=8.20 Hz, 2H) 11.36 (br. s., 1H)

Workup

  1. customAfter 12 h the reaction was quenched by the addition of saturated aqueous NaHCO3
  2. customThe layers were separated
  3. dry with materialthe organic layer was dried (Na2SO4)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customPurification by flash column chromatography on silica gel (hexanes/ethyl acetate 7:3-6:4)

Sources & evidence

ORD record
ord-331867975e8c426c94d9c62901239378
Source dataset
uspto-grants-2014_10
Patent number
US08853258B2

Reaction notes

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