Trifluoroacetic acid → methyl 2-(6-(N-(thiazol-2-yl)sulfamoyl)isoquinolin-1-yl)-5-(trifluoromethyl)benzimidate

HRID 1473453Notes

Reaction equation

HRID 1473453 reaction equation
[C:1]([C:3]1[CH:8]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:6]=[CH:5][C:4]=1[C:13]1[C:22]2[C:17](=[CH:18][C:19]([S:23]([N:26](CC3C=CC(OC)=CC=3OC)[C:27]3[S:28][CH:29]=[CH:30][N:31]=3)(=[O:25])=[O:24])=[CH:20][CH:21]=2)[CH:16]=[CH:15][N:14]=1)#[N:2].[C:43](O)(C(F)(F)F)=[O:44]>C(Cl)Cl>[S:28]1[CH:29]=[CH:30][N:31]=[C:27]1[NH:26][S:23]([C:19]1[CH:18]=[C:17]2[C:22](=[CH:21][CH:20]=1)[C:13]([C:4]1[CH:5]=[CH:6][C:7]([C:9]([F:11])([F:12])[F:10])=[CH:8][C:3]=1[C:1](=[NH:2])[O:44][CH3:43])=[N:14][CH:15]=[CH:16]2)(=[O:25])=[O:24]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 866874981-(2-cyano-4-(trifluoromethyl)phenyl)-N-(2,4-dimethoxybenzyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide

Product 1

HCID 86687499methyl 2-(6-(N-(thiazol-2-yl)sulfamoyl)isoquinolin-1-yl)-5-(trifluoromethyl)benzimidateYield 88.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1-(2-cyano-4-(trifluoromethyl)phenyl)-N-(2,4-dimethoxybenzyl)-N-(thiazol-2-yl)isoquinoline-6-sulfonamide (0.011 g, 0.018 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 an orange solid. The material was purified via silica gel column chromatography (12 g silica gel column, gradient elution 0 to 10% MeOH:DCM) to afford methyl 2-(6-(N-(thiazol-2-yl)sulfamoyl)isoquinolin-1-yl)-5-(trifluoromethyl)benzimidate (0.008 g, 0.016 mmol, 9.10% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm=12.90 (br. s., 1H), 8.78 (br. s., 1H), 8.66 (d, J=5.6 Hz, 1H), 8.58 (s, 1H), 8.14 (d, J=5.0 Hz, 1H), 8.06 (br. s., 1H), 7.99 (d, J=7.5 Hz, 1H), 7.89-7.83 (m, 1H), 7.77 (d, J=8.5 Hz, 2H), 7.28 (d, J=4.6 Hz, 1H), 6.87 (d, J=4.6 Hz, 1H), 3.02 (s, 3H). m/z (ESI) 493.2 (M+H)+.

Workup

  1. concentrationThe reaction was concentrated
  2. dissolutiondissolved in methanol
  3. customThe column was flushed several times with methanol
  4. customby flushing the column several times with 2.0 M ammonia in methanol
  5. concentrationThe product-containing filtrate was concentrated
  6. customto afford an orange solid
  7. customThe material was purified via silica gel column chromatography (12 g silica gel column, gradient elution 0 to 10% MeOH:DCM)

Sources & evidence

ORD record
ord-7f03b8ae998c4314a911d6989f95ab66
Source dataset
uspto-grants-2015_04
Patent number
US09012443B2

Reaction notes

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