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Hydrochloric Acid → Ammonium Hydroxide

HRID 593517
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Reaction equation

HRID 593517 reaction equation
[I-].[Li+].C([O:5][C:6](=[O:33])[C:7]1[C:12]([CH3:13])=[CH:11][C:10]([CH2:14][N:15]2[C:23]3[C:18](=[CH:19][C:20]([Cl:24])=[CH:21][CH:22]=3)[C:17]([CH3:25])=[C:16]2[C:26]2[CH:27]=[N:28][CH:29]=[CH:30][CH:31]=2)=[CH:9][C:8]=1[CH3:32])C.Cl>N1C(C)=CC=CC=1C>[NH4+:15].[OH-:5].[CH3:13][C:12]1[CH:11]=[C:10]([CH2:14][N:15]2[C:23]3[C:18](=[CH:19][C:20]([Cl:24])=[CH:21][CH:22]=3)[C:17]([CH3:25])=[C:16]2[C:26]2[CH:27]=[N:28][CH:29]=[CH:30][CH:31]=2)[CH:9]=[C:8]([CH3:32])[C:7]=1[C:6]([OH:33])=[O:5]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 66321Lithium iodideHCID 582156242,6-Dimethyl-4-(5-chloro-3-methyl-2-pyridin-3-yl-indol-1-ylmethyl)-benzoic acid ethyl ester

Product 2

HCID 14923Ammonium HydroxideYield 0.1%HCID 582155892,6-Dimethyl-4-(5-chloro-3-methyl-2-pyridin-3-yl-indol-1-ylmethyl)-benzoic acid

Reagents, catalysts & solvents

1
HCID 79372,6-LutidineSolvent

Procedure

To a refluxing solution of lithium iodide (0.218 g, 1.626 mmol) in 2,6-lutidine (5 mL) is added 2,6-dimethyl-4-(5-chloro-3-methyl-2-pyridin-3-yl-indol-1-ylmethyl)-benzoic acid ethyl ester (0.176 g, 0.407 mmol). The reaction is refluxed overnight. It is cooled to room temperature, acidified to pH 1 using 1M aqueous HCl solution and extracted with dichloromethane. The organic layer is dried over sodium sulfate and concentrated in vacuo. The residue is purified by reverse phase HPLC with Xbridge Shield RP18 column and a 0.1% aqueous NH4OH in acetonitrile gradient to afford 2,6-dimethyl-4-(5-chloro-3-methyl-2-pyridin-3-yl-indol-1-ylmethyl)-benzoic acid as a solid. 1H NMR (400 MHz, MeOD) δ ppm 2.22 (s, 6H), 2.28 (s, 3H), 5.22 (s, 2H), 6.49 (s, 2H), 7.15 (dd, J=8.6, 2.0 Hz, 1H), 7.30 (d, J=8.8 Hz, 1H), 7.51-7.57 (m, 1H), 7.61 (d, J=1.8 Hz, 1H), 7.81 (dt, J=8.1, 2.0, 1.8 Hz, 1H), 8.58 (d, J=1.3 Hz, 1H), 8.61 (dd, J=4.9, 1.6 Hz, 1H). HRMS (ESI) m/z 405.1379 [(M+H)+ Calcd for C24H21ClN2O2: 405.1370].

Workup

  1. temperatureThe reaction is refluxed overnight
  2. extractionextracted with dichloromethane
  3. dry with materialThe organic layer is dried over sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe residue is purified by reverse phase HPLC with Xbridge Shield RP18 column

Sources & evidence

ORD record
ord-10fe19f01953441e80f57b183bb56a2d
Source dataset
uspto-grants-2016_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09242963B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes