Acetic Acid → 1-({2-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indol-3-yl]ethyl}amino)cyclopropanecarboxylic acid

HRID 1512926Notes

Reaction equation

HRID 1512926 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:18]=[CH:19][CH:20]=[C:21]4[C:25]=3[N:24]([CH3:26])[CH:23]=[C:22]4[CH2:27][CH:28]=O)[N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10].[NH2:30][C:31]1([C:34]([OH:36])=[O:35])[CH2:33][CH2:32]1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(Cl)Cl>[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:18]=[CH:19][CH:20]=[C:21]4[C:25]=3[N:24]([CH3:26])[CH:23]=[C:22]4[CH2:27][CH2:28][NH:30][C:31]3([C:34]([OH:36])=[O:35])[CH2:33][CH2:32]3)[N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:10])[CH3:11]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 5351-Aminocyclopropane-1-carboxylic acidHCID 5049666Sodium triacetoxyborohydrideHCID 59146184HCID 59146184, compound

Product 1

HCID 445490351-({2-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indol-3-yl]ethyl}amino)cyclopropanecarboxylic acidYield 13.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
20 °C

Procedure

To a stirred solution of [7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indol-3-yl]acetaldehyde (D88) (50 mg), 1-aminocyclopropanecarboxylic acid (25 mg) and acetic acid (0.1 mL) in DCM (10 mL) was added sodium triacetoxyborohydride (52 mg). The reaction was stirred at 20° C. for 3 h. The mixture was concentrated and the residue was partitioned between ethyl acetate (25 mL) and aqueous HCl (2 M, 25 mL). The organic phase was washed with water (25 mL) and brine (25 mL), dried over anhydrous sodium sulphate and evaporated to give the crude product, which was purified by Mass Directed Auto Prep to afford 1-({2-[7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indol-3-yl]ethyl}amino)cyclopropanecarboxylic acid (E68) (8 mg, TFA salt). δH (DMSO-d6, 400 MHz): 1.36 (6H, d), 1.41 (4H, m), 3.06 (2H, t), 3.31 (2H, t), 3.65 (3H, s), 4.88 (1H, m), 7.22 (1H, t), 7.33 (1H, s), 7.46 (2H, m), 7.81 (1H, dd), 8.12 (1H, dd), 8.19 (1H, d). MS (ES): C26H27ClN4O4 requires 494; found 495.2 (M+H+).

Workup

  1. concentrationThe mixture was concentrated
  2. customthe residue was partitioned between ethyl acetate (25 mL) and aqueous HCl (2 M, 25 mL)
  3. washThe organic phase was washed with water (25 mL) and brine (25 mL)
  4. dry with materialdried over anhydrous sodium sulphate
  5. customevaporated
  6. customto give the crude product, which
  7. customwas purified by Mass Directed Auto Prep

Sources & evidence

ORD record
ord-524f7369af6641bf886e635d6db37d00
Source dataset
uspto-grants-2012_07
Patent number
US08217028B2

Reaction notes

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