Dimethylformamide → tert-butyl 8-(6-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-1-methyl-1H-indol-3-yl)-3,4-dihydroisoquinoline-2(1H)-carboxylate

HRID 1524438Notes

Reaction equation

HRID 1524438 reaction equation
[CH3:1][O:2][C:3]1[CH:37]=[C:36]([O:38][CH3:39])[CH:35]=[CH:34][C:4]=1[CH2:5][N:6]([C:29]1[S:33][N:32]=[CH:31][N:30]=1)[S:7]([C:10]1[CH:18]=[C:17]2[C:13]([C:14](B3OC(C)(C)C(C)(C)O3)=[CH:15][N:16]2[CH3:19])=[CH:12][CH:11]=1)(=[O:9])=[O:8].Br[C:41]1[CH:42]=[CH:43][CH:44]=[C:45]2[C:50]=1[CH2:49][N:48]([C:51]([O:53][C:54]([CH3:57])([CH3:56])[CH3:55])=[O:52])[CH2:47][CH2:46]2.P([O-])([O-])([O-])=O.[K+].[K+].[K+].CN(C=O)C>C(OCC)(=O)C.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:37]=[C:36]([O:38][CH3:39])[CH:35]=[CH:34][C:4]=1[CH2:5][N:6]([C:29]1[S:33][N:32]=[CH:31][N:30]=1)[S:7]([C:10]1[CH:18]=[C:17]2[C:13]([C:14]([C:41]3[CH:42]=[CH:43][CH:44]=[C:45]4[C:50]=3[CH2:49][N:48]([C:51]([O:53][C:54]([CH3:57])([CH3:56])[CH3:55])=[O:52])[CH2:47][CH2:46]4)=[CH:15][N:16]2[CH3:19])=[CH:12][CH:11]=1)(=[O:8])=[O:9]

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 62657Potassium Phosphate, TribasicHCID 59463272Tert-butyl 8-bromo-1,2,3,4-tetrahydroisoquinoline-2-carboxylate2×HCID 71259251N-(2,4-dimethoxybenzyl)-1-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-(1,2,4-thiadiazol-5-yl)-1H-indole-6-sulfonamide2×

Product 1

HCID 71259294tert-butyl 8-(6-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-1-methyl-1H-indol-3-yl)-3,4-dihydroisoquinoline-2(1H)-carboxylate

Reagents, catalysts & solvents 2

HCID 178418807HCID 178418807, compoundCatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
85 °C

Procedure

A vial was charged with N-(2,4-dimethoxybenzyl)-1-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-(1,2,4-thiadiazol-5-yl)-1H-indole-6-sulfonamide (Intermediate H)(0.188 g, 0.330 mmol), tert-butyl 8-bromo-3,4-dihydroisoquinoline-2(1H)-carboxylate (0.257 g, 0.824 mmol), potassium phosphate (0.315 g, 1.483 mmol), and PdCl2(dppf)-CH2Cl2 adduct (0.027 g, 0.033 mmol). DMF (2.197 ml) was added, and the vial was flushed with argon, sealed, and stirred at 85° C. for two hours. Additional tert-butyl 8-bromo-3,4-dihydroisoquinoline-2(1H)-carboxylate (Oakwood Inc., West Columbia, S.C.) (0.257 g, 0.824 mmol) was added and the reaction was stirred at 85° C. for two hours. 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 washed with brine, dried with sodium sulfate, filtered, and concentrated. The material was purified via column chromatography (RediSep Gold 40 g silica gel column (Teledyne Isco, Lincoln, Nebr.), gradient elution 0 to 100% EtOAc:Hex) to afford tert-butyl 8-(6-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-1-methyl-1H-indol-3-yl)-3,4-dihydroisoquinoline-2(1H)-carboxylate as a light yellow solid.

Workup

  1. customthe vial was flushed with argon
  2. customsealed
  3. stirringthe reaction was stirred at 85° C. for two hours
  4. washwashed with water
  5. extractionThe aqueous layer was extracted with ethyl acetate
  6. washthe combined organic layers were washed with brine
  7. dry with materialdried with sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe material was purified via column chromatography (RediSep Gold 40 g silica gel column (Teledyne Isco, Lincoln, Nebr.), gradient elution 0 to 100% EtOAc:Hex)

Sources & evidence

ORD record
ord-39b7d73d315c44e8b833a0c5fdb0659e
Source dataset
uspto-grants-2015_07
Patent number
US09079902B2

Reaction notes

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