Potassium Carbonate → N-(2,4-dimethoxybenzyl)-1-(2-fluoro-4-(trifluoromethyl)phenyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide

HRID 1473456Notes

Reaction equation

HRID 1473456 reaction equation
Cl[C:2]1[C:11]2[C:6](=[CH:7][C:8]([S:12]([N:15]([CH2:21][C:22]3[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][C:23]=3[O:30][CH3:31])[C:16]3[S:17][CH:18]=[CH:19][N:20]=3)(=[O:14])=[O:13])=[CH:9][CH:10]=2)[CH:5]=[CH:4][N:3]=1.[F:32][C:33]1[CH:38]=[C:37]([C:39]([F:42])([F:41])[F:40])[CH:36]=[CH:35][C:34]=1B(O)O.C(=O)([O-])[O-].[K+].[K+].O1CCOCC1>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.O>[CH3:31][O:30][C:23]1[CH:24]=[C:25]([O:28][CH3:29])[CH:26]=[CH:27][C:22]=1[CH2:21][N:15]([C:16]1[S:17][CH:18]=[CH:19][N:20]=1)[S:12]([C:8]1[CH:7]=[C:6]2[C:11](=[CH:10][CH:9]=1)[C:2]([C:34]1[CH:35]=[CH:36][C:37]([C:39]([F:42])([F:41])[F:40])=[CH:38][C:33]=1[F:32])=[N:3][CH:4]=[CH:5]2)(=[O:14])=[O:13]

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 164141452-Fluoro-4-(trifluoromethyl)benzeneboronic acidHCID 866873781-chloro-N-(2,4-dimethoxybenzyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide

Product 1

HCID 86687501N-(2,4-dimethoxybenzyl)-1-(2-fluoro-4-(trifluoromethyl)phenyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamideYield 85.5%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
90 °C

Procedure

A microwave vial was charged with 1-chloro-N-(2,4-dimethoxybenzyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide (Intermediate OOO; 0.250 g, 0.525 mmol), (2-fluoro-4-(trifluoromethyl)phenyl)boronic acid (0.164 g, 0.788 mmol), Pd(PPh3)4 (0.061 g, 0.053 mmol), and potassium carbonate (0.363 g, 2.63 mmol). Dioxane (2.63 mL) and Water (0.875 mL) were added, the vial was flushed with argon and sealed, and heated in a microwave reactor at 90° C. for 30 minutes. The reaction was diluted with ethyl acetate and washed with water. The aqueous layer was extracted with ethyl acetate, and the combined organic layers were dried with sodium sulfate, filtered, and concentrated. The material was purified via silica gel column chromatography (12 g, gradient elution 0 to 50% EtOAc:Heptane) to afford N-(2,4-dimethoxybenzyl)-1-(2-fluoro-4-(trifluoromethyl)phenyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide (0.271 g, 0.449 mmol, 85% yield) as a white solid. N-(2,4-dimethoxybenzyl)-1-(2-fluoro-4-(trifluoromethyl)phenyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide (35 mg, 0.058 mmol) was dissolved in 1 mL of DCM and TFA (0.1 ml, 1.298 mmol) was added. The reaction was stirred for 30 minutes at room temperature. The reaction was concentrated, dissolved in methanol, and passed through an SCX ion exchange column (pre-wetted with methanol). The column was flushed several times with methanol, then the product was liberated by flushing the column several times with 2.0 M ammonia in methanol. The product-containing filtrate was concentrated to afford 1-(2-fluoro-4-(trifluoromethyl)phenyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm=12.92 (br. s., 1H), 8.77 (d, J=5.7 Hz, 1H), 8.62 (d, J=1.6 Hz, 1H), 8.24 (d, J=5.6 Hz, 1H), 7.99-7.91 (m, 2H), 7.89-7.77 (m, 3H), 7.27 (d, J=4.6 Hz, 1H), 6.87 (d, J=4.6 Hz, 1H). m/z (ESI) 454.1 (M+H)+.

Workup

  1. customthe vial was flushed with argon
  2. customsealed
  3. additionThe reaction was diluted with ethyl acetate
  4. washwashed with water
  5. extractionThe aqueous layer was extracted with ethyl acetate
  6. dry with materialthe combined organic layers were dried with sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe material was purified via silica gel column chromatography (12 g, gradient elution 0 to 50% EtOAc:Heptane)

Sources & evidence

ORD record
ord-665d065bfab1426c8b3a18b18b7bd5ce
Source dataset
uspto-grants-2015_04
Patent number
US09012443B2

Reaction notes

Loading…