Diisopropylethylamine → tert-butyl 1-((3,5-difluoro-4-(1-methoxy-2-methylpropan-2-yl)phenyl)carbamoyl)-6-ethoxy-3,4-dihydroisoquinoline-2(1H)-carboxylate

HRID 2202272Notes

Reaction equation

HRID 2202272 reaction equation
C(P1(=O)OP(CCC)(=O)OP(CCC)(=O)O1)CC.[C:19]([O:23][C:24]([N:26]1[CH2:35][CH2:34][C:33]2[C:28](=[CH:29][CH:30]=[C:31]([O:36][CH2:37][CH3:38])[CH:32]=2)[CH:27]1[C:39]([OH:41])=O)=[O:25])([CH3:22])([CH3:21])[CH3:20].[F:42][C:43]1[CH:44]=[C:45]([CH:47]=[C:48]([F:56])[C:49]=1[C:50]([CH3:55])([CH3:54])[CH2:51][O:52][CH3:53])[NH2:46].CCN(C(C)C)C(C)C>CN(C1C=CN=CC=1)C.C(OCC)(=O)C.O>[F:42][C:43]1[CH:44]=[C:45]([NH:46][C:39]([CH:27]2[C:28]3[C:33](=[CH:32][C:31]([O:36][CH2:37][CH3:38])=[CH:30][CH:29]=3)[CH2:34][CH2:35][N:26]2[C:24]([O:23][C:19]([CH3:20])([CH3:22])[CH3:21])=[O:25])=[O:41])[CH:47]=[C:48]([F:56])[C:49]=1[C:50]([CH3:54])([CH3:55])[CH2:51][O:52][CH3:53]

Participants

8

Reactant 4

HCID 81531DiisopropylethylamineHCID 111923Propylphosphonic anhydrideHCID 1186226932-(Tert-butoxycarbonyl)-6-ethoxy-1,2,3,4-tetrahydroisoquinoline-1-carboxylic acidHCID 1186228033,5-Difluoro-4-(1-methoxy-2-methylpropan-2-yl)aniline

Product 1

HCID 118622717tert-butyl 1-((3,5-difluoro-4-(1-methoxy-2-methylpropan-2-yl)phenyl)carbamoyl)-6-ethoxy-3,4-dihydroisoquinoline-2(1H)-carboxylateYield 82%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

T3P (9.88 mL, 16.80 mmol) was added to a solution of 2-(tert-butoxycarbonyl)-6-ethoxy-1,2,3,4-tetrahydroisoquinoline-1-carboxylic acid (1.8 g, 5.60 mmol), 3,5-difluoro-4-(1-methoxy-2-methylpropan-2-yl)aniline (1.206 g, 5.60 mmol), DIEA (4.89 mL, 28.01 mmol) and DMAP (0.684 g, 5.60 mmol) in ethyl acetate (5 mL), and the mixture was stirred overnight at 60° C. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The organic layer was washed with 10% aqueous citric acid solution, aqueous sodium hydrogencarbonate solution and brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent gradient; 3→50% ethyl acetate/hexane) to give tert-butyl 1-((3,5-difluoro-4-(1-methoxy-2-methylpropan-2-yl)phenyl)carbamoyl)-6-ethoxy-3,4-dihydroisoquinoline-2(1H)-carboxylate (2.380 g, 4.59 mmol, 82%) as a white solid.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with 10% aqueous citric acid solution, aqueous sodium hydrogencarbonate solution and brine
  3. dry with materialdried over magnesium sulfate
  4. customthe solvent was evaporated under reduced pressure
  5. customThe obtained residue was purified by silica gel column chromatography (solvent gradient; 3→50% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-12621204e001486ab13651f53a115d3d
Source dataset
uspto-grants-2016_06
Patent number
US09365520B2

Reaction notes

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