1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 3-Methyl-isoxazole-4-carboxylic acid (1,2,3,4-tetrahydro-naphthalen-1-yl)-amide

HRID 1644124Notes

Reaction equation

HRID 1644124 reaction equation
[CH3:1][C:2]1[C:6]([C:7]([OH:9])=O)=[CH:5][O:4][N:3]=1.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.[NH2:31][C@H:32]1[C:41]2[C:36](=[CH:37][CH:38]=[CH:39][CH:40]=2)[CH2:35][CH2:34][CH2:33]1>C(Cl)Cl.CN(C=O)C>[CH:32]1([NH:31][C:7]([C:6]2[C:2]([CH3:1])=[N:3][O:4][CH:5]=2)=[O:9])[C:41]2[C:36](=[CH:37][CH:38]=[CH:39][CH:40]=2)[CH2:35][CH2:34][CH2:33]1

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 45896923-Methyl-1,2-oxazole-4-carboxylic acidHCID 70580721-Aminotetralin, (R)-

Product 1

HCID 111728863-Methyl-isoxazole-4-carboxylic acid (1,2,3,4-tetrahydro-naphthalen-1-yl)-amideYield 62.5%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 3-Methyl-isoxazole-4-carboxylic acid (0.52 g, 4.06 mmol) in DCM (15 mL) and DMF (2 mL), was added HOBt (1.1 g, 8.14 mmol) and EDCI (0.896 g 4.67 mmol). The clear yellow solution was cooled to 0 C and allowed to stir under Ar for 15 minutes. To the solution was added (R)-1-Amino-1,2,3,4-tetrahydronaphthalene (0.73 mL, 5.04 mmol and the reaction mixture was allowed to slowly warm to ambient temperature and was stirred for overnight. Dilution with DCM (50 mL) was followed by aqueous extraction (NaHCO3 water, brine (50 mL), drying over MgSO4, filtration and removal of solvent in vacuo. Silica gel chromatography (0-25% Hexane:EtOAc) afforded the title compound (650 mg; 62.5%) as a sticky solid. 1H NMR (CDCl3) δ 1.88 (m, 3H), 2.12 (m, 1H), 2.51 (s, 3H), 2.81 (m, 2H), 5.32 (m, 1H), 5.99 (bd, 1H), 7.13 (m, 1H), 7.20 (m, 2H) 7.20 (m, 2H); 13C NMR (CDCl3) δ 11.22, 20.15, 29.41, 30.35, 47.93, 116.73, 126.72, 127.88, 128.88, 129.65, 136.25, 138.00, 158.45, 160.28. ESIMS: 257 (M+H) EA calc'd for C15H16N2O2: C, 70.29; H, 6.29; N, 10.93. found C, 70.61; H, 6.11; N, 11.09.

Workup

  1. temperatureThe clear yellow solution was cooled to 0 C
  2. stirringwas stirred for overnight
  3. extractionDilution with DCM (50 mL) was followed by aqueous extraction (NaHCO3 water, brine (50 mL)
  4. dry with materialdrying over MgSO4, filtration and removal of solvent in vacuo

Sources & evidence

ORD record
ord-708ac120fb764d5bb0dd96dfa9f2cc8a
Source dataset
uspto-grants-2012_02
Patent number
US08124121B2

Reaction notes

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