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Triethylamine → methyl (R)-3-methoxy-4-[1-methyl-5-(2-methyl-4,4,4-trifluorobutylcarbamoyl)indol-3-ylmethyl]benzoate

HRID 1741917
Notes
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Reaction equation

HRID 1741917 reaction equation
Cl.[CH3:2][C@H:3]([CH2:6][C:7]([F:10])([F:9])[F:8])[CH2:4][NH2:5].[C:11]([C:14]1[CH:15]=[C:16]2[C:20](=[CH:21][CH:22]=1)[N:19]([CH3:23])[CH:18]=[C:17]2[CH2:24][C:25]1[CH:34]=[CH:33][C:28]([C:29]([O:31][CH3:32])=[O:30])=[CH:27][C:26]=1[O:35][CH3:36])(O)=[O:12].Cl.CN(C)CCCN=C=NCC.C(N(CC)CC)C>CN(C)C1C=CN=CC=1.C(Cl)Cl>[CH3:36][O:35][C:26]1[CH:27]=[C:28]([CH:33]=[CH:34][C:25]=1[CH2:24][C:17]1[C:16]2[C:20](=[CH:21][CH:22]=[C:14]([C:11](=[O:12])[NH:5][CH2:4][C@H:3]([CH3:2])[CH2:6][C:7]([F:10])([F:9])[F:8])[CH:15]=2)[N:19]([CH3:23])[CH:18]=1)[C:29]([O:31][CH3:32])=[O:30]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 9998178Methyl 4-(5-carboxy-1-methylindol-3-ylmethyl)-3-methoxybenzoateHCID 12004108(R)-2-methyl-4,4,4-trifluorobutylamine hydrochloride

Product 1

HCID 10050661methyl (R)-3-methoxy-4-[1-methyl-5-(2-methyl-4,4,4-trifluorobutylcarbamoyl)indol-3-ylmethyl]benzoate
Yield 55.1%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

A mixture of (R)-2-methyl-4,4,4-trifluorobutylamine hydrochloride (9.79 g), methyl 4-(5-carboxy-1-methylindol-3-ylmethyl)-3-methoxybenzoate (20.55 g), 4-dimethylaminopyridine (7.45 g), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (15.07 g) and triethylamine (9.3 mL) was dissolved in dry methylene chloride (240 mL) and the solution was stirred under an inert atmosphere for 18 h. The mixture was diluted with methylene chloride (200 mL) and washed twice with 1N hydrochloric acid. The combined acid washes were back extracted with methylene chloride and the combined organic extracts were washed (water, brine), dried (MgSO4), and evaporated. The residue was purified by flash chromatography, eluting with 97:3 methylene chloride:ethyl acetate to give methyl (R)-3-methoxy-4-[1-methyl-5-(2-methyl-4,4,4-trifluorobutylcarbamoyl)indol-3-ylmethyl]benzoate (14.48 g, 55%) as a white solid; mp 150°-151° C.; partial NMR (300 MHz, CDCl3): 1.12 (d, 3H, CH3), 1.98-2.08 (m, 1H, CHCH3) 2.12-2.44 (m, 2H, CF3CH2), 3.30-3.58 (m, 2H, CH2N), 3.76 (s, 3H, NCH3), 3.90 (s, 3H, OCH3), 3.93 (s, 3H, OCH3), 4.13 (s, 2H, ArCH2Ar'), 6.23 (br t, 1H, NHCO).

Workup

  1. washwashed twice with 1N hydrochloric acid
  2. extractionThe combined acid washes were back extracted with methylene chloride
  3. washthe combined organic extracts were washed (water, brine)
  4. dry with materialdried (MgSO4)
  5. customevaporated
  6. customThe residue was purified by flash chromatography
  7. washeluting with 97:3 methylene chloride

Sources & evidence

ORD record
ord-22d6946b8f52498f89950627d2efde73
Source dataset
uspto-grants-1994_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05334765

Reaction notes

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