Hydrochloric Acid → 1-Cyano-4-hydroxy-6-(4-propoxy-phenoxy)-isoquinoline-3-carboxylic acid butyl ester

HRID 409273Notes

Reaction equation

[CH2:1]([O:5][C:6]([C:8]1[N:9]=[C:10](Br)[C:11]2[C:16]([C:17]=1[OH:18])=[CH:15][C:14]([O:19][C:20]1[CH:25]=[CH:24][C:23]([O:26][CH2:27][CH2:28][CH3:29])=[CH:22][CH:21]=1)=[CH:13][CH:12]=2)=[O:7])[CH2:2][CH2:3][CH3:4].[C:31]([Cu])#[N:32].[OH-].[NH4+].Cl>CCOC(C)=O.CN1CCCC1=O>[CH2:1]([O:5][C:6]([C:8]1[N:9]=[C:10]([C:31]#[N:32])[C:11]2[C:16]([C:17]=1[OH:18])=[CH:15][C:14]([O:19][C:20]1[CH:25]=[CH:24][C:23]([O:26][CH2:27][CH2:28][CH3:29])=[CH:22][CH:21]=1)=[CH:13][CH:12]=2)=[O:7])[CH2:2][CH2:3][CH3:4]

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 1-bromo-4-hydroxy-6-(4-propoxy-phenoxy)-isoquinoline-3-carboxylic acid butyl ester (315 mg, 0.664 mmol), CuCN (66 mg, 0.730 mmol), and N-methylpyrrolidinone (2 mL) was stirred at 120° C. for 4 h. After cooling to room temperature the mixture was poured into EtOAc (20 mL) and saturated ammonium hydroxide solution (˜1 mL) was added. The mixture was rapidly stirred for 2 min. Then it was acidified with concentrated HCl, washed with water, and saturated NaCl solution before it was dried over anhydrous sodium sulfate, and concentrated in vacuo. The residue was purified by column chromatography to give title compound (206 mg). ESI MS (m/z): 421 (M+H+).

Workup

temperatureAfter cooling to room temperature the mixture
additionwas added
stirringThe mixture was rapidly stirred for 2 min
washwashed with water, and saturated NaCl solution before it
dry with materialwas dried over anhydrous sodium sulfate
concentrationconcentrated in vacuo
customThe residue was purified by column chromatography

Sources & evidence

ORD record: ord-0ad15822ca9846e8886238cb9d911f7e
Source dataset: uspto-grants-2014_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08759373B2

Reaction notes

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