Hydrochloric Acid → 2-[4-[[2-(3-Chlorophenyl)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]amino]phenyl]acetic acid

HRID 1508677Notes

Reaction equation

HRID 1508677 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:13]=[C:12]3[CH2:14][CH2:15][CH2:16][C:11]3=[C:10]([NH:17][C:18]3[CH:23]=[CH:22][C:21]([CH2:24][C:25]([O:27]C)=[O:26])=[CH:20][CH:19]=3)[CH:9]=2)[CH:5]=[CH:6][CH:7]=1.O.[OH-].[Li+].C1COCC1.Cl>O>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:13]=[C:12]3[CH2:14][CH2:15][CH2:16][C:11]3=[C:10]([NH:17][C:18]3[CH:19]=[CH:20][C:21]([CH2:24][C:25]([OH:27])=[O:26])=[CH:22][CH:23]=3)[CH:9]=2)[CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 168937Lithium hydroxide, monohydrateHCID 90110493methyl 2-[4-[[2-(3-chlorophenyl)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]amino]phenyl]acetate

Product 1

HCID 742208432-[4-[[2-(3-Chlorophenyl)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]amino]phenyl]acetic acidYield 81%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

An 18-mL vial was charged with methyl 2-[4-[[2-(3-chlorophenyl)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]amino]phenyl]acetate (31 mg, 0.77 mmol, 1 eq.) and lithium hydroxide monohydrate (48 mg, 1.14 mmol, 1.48 eq.). To this was added THF (1 ml) and water (0.5 ml). The resulting mixture was stirred at room temperature overnight. Then 2N HCl aq. (0.6 ml) was added. The volatile materials were removed under reduced pressure to give a residue, which was purified by chromatography on silica gel using 2˜5% of MeOH in dichloromethane as eluent to give 2-[4-[[2-(3-Chlorophenyl)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]amino]phenyl]acetic acid (26 mg, HCl salt, 81% yield). MW=378.85. 1H NMR (DMSO-D6, 360 MHz) δ 14.23 (brs, 1H), 12.39 (brs, 1H), 9.84 (brs, 1H), 7.91 (s, 1H), 7.70 (d, J=7.70 Hz, 1H), 7.63 (d, J=8.40, 1H), 7.57 (dd, J=7.70, 8.40 Hz, 1H), 7.36 (brs, 4H), 7.02 (s, 1H), 3.60 (s, 2H), 3.11 (t, J=7.90 Hz, 2H), 2.90 (t, J=7.40 Hz, 2H), 2.20 (m, 2H).

Workup

  1. customThe volatile materials were removed under reduced pressure
  2. customto give a residue, which
  3. customwas purified by chromatography on silica gel using 2˜5% of MeOH in dichloromethane as eluent

Sources & evidence

ORD record
ord-4ddb6be559ea420e8defb700ddb733ec
Source dataset
uspto-grants-2015_12
Patent number
US09221843B2

Reaction notes

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