Sodium Carbonate → HCID 76281870, compound

HRID 929818Notes

Reaction equation

HRID 929818 reaction equation
[CH3:1][CH:2]1[CH2:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[NH:3]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].[CH:25]([C:27]1[CH:32]=[CH:31][C:30]([C:33]2[CH:37]=[C:36]([C:38]([NH2:40])=[O:39])[O:35][N:34]=2)=[CH:29][CH:28]=1)=O.C([O-])([O-])=O.[Na+].[Na+]>ClC(Cl)C.CC(O)=O>[CH3:1][CH:2]1[CH2:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:3]1[CH2:25][C:27]1[CH:28]=[CH:29][C:30]([C:33]2[CH:37]=[C:36]([C:38]([NH2:40])=[O:39])[O:35][N:34]=2)=[CH:31][CH:32]=1

Participants

7

Reactant 4

HCID 10340Sodium CarbonateHCID 233052-MethylindolineHCID 5049666Sodium triacetoxyborohydrideHCID 90202333HCID 90202333, compound2×

Product 1

HCID 76281870HCID 76281870, compoundYield 80.6%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 63651,1-DichloroethaneSolvent2×

Procedure

To a solution of 2-methylindoline (21 μL, 0.16 mmol) in dichloroethane (1 mL) was added Na(OAc)3BH (88 mg, 0.415 mmol). The mixture was stirred at room temperature under argon for 20 min. A slurry of 3-(4-formyl-phenyl)-isoxazole-5-carboxylic acid amide (which may be prepared as described in Preparation of Intermediate 20; 20 mg, 0.093 mmol) in dichloroethane (1 mL) was added, followed by AcOH (20 μL). The reaction mixture was stirred at room temperature overnight. 1 M Na2CO3 solution was added and the mixture was extracted with CHCl3 (3×25 mL). The organic layer was washed with brine, dried (Na2SO4), evaporated, and purified by chromatography (11-20% acetone/CH2Cl2) to give 3-[4-(2-methyl-2,3-dihydro-indol-1-ylmethyl)-phenyl]-isoxazole-5-carboxylic acid amide (25 mg, 54%) as a white powder. 1H NMR (300 MHz, DMSO-d6) δ ppm 8.36 (br. s., 1H), 7.98 (br. s., 1H), 7.85 (d, J=8.2 Hz, 2H), 7.56 (s, 1H), 7.48 (d, J=7.8 Hz, 2H), 6.99 (d, J=7.2 Hz, 1H), 6.84-6.94 (m, 1H), 6.53 (t, J=7.4 Hz, 1H), 6.31 (d, J=7.8 Hz, 1H), 4.45 (d, J=16.3 Hz, 1H), 4.14-4.27 (m, 1H), 3.57-3.76 (m, 1H), 3.12 (dd, J=15.8, 8.6 Hz, 1H), 2.56 (dd, J=16.0, 9.4 Hz, 1H), 1.25 (d, J=6.3 Hz, 3H).

Workup

  1. stirringThe reaction mixture was stirred at room temperature overnight
  2. extractionthe mixture was extracted with CHCl3 (3×25 mL)
  3. washThe organic layer was washed with brine
  4. dry with materialdried (Na2SO4)
  5. customevaporated
  6. custompurified by chromatography (11-20% acetone/CH2Cl2)

Sources & evidence

ORD record
ord-90f59cec47ae49f0a5987b6a3a262a59
Source dataset
uspto-grants-2016_03
Patent number
US09296711B2

Reaction notes

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