Diisopropylethylamine → HCID 86642208, compound

HRID 2168883Notes

Reaction equation

HRID 2168883 reaction equation
[CH3:1][O:2][CH2:3][CH2:4][CH2:5][CH2:6][N:7]1[C:15]2[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=2)[CH:9]=[C:8]1[C:16]([OH:18])=O.[CH3:19][CH:20]([CH3:40])[CH2:21][NH:22][C@@H:23]1[CH2:28][N:27]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:26][C@H:25]([C:36]([O:38][CH3:39])=[O:37])[CH2:24]1.C(N(C(C)C)CC)(C)C.F[P-](F)(F)(F)(F)F.ClC(N(C)C)=[N+](C)C>C(Cl)Cl>[CH3:1][O:2][CH2:3][CH2:4][CH2:5][CH2:6][N:7]1[C:15]2[C:10](=[CH:11][CH:12]=[CH:13][CH:14]=2)[CH:9]=[C:8]1[C:16]([N:22]([CH2:21][CH:20]([CH3:40])[CH3:19])[C@@H:23]1[CH2:28][N:27]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:26][C@H:25]([C:36]([O:38][CH3:39])=[O:37])[CH2:24]1)=[O:18]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 10989639Chloro-N,N,N',N'-tetramethylformamidinium HexafluorophosphateHCID 58355509HCID 58355509, compoundHCID 593566071-tert-butyl 3-methyl (3R,5S)-5-[(2-methylpropyl)amino]piperidine-1,3-dicarboxylate

Product 1

HCID 86642208HCID 86642208, compoundYield 7.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1-(4-Methoxybutyl)-1H-indole-2-carboxylic acid (247 mg), 1-tert-butyl 3-methyl(3R,5S)-5-[(2-methylpropyl)amino]piperidine-1,3-dicarboxylate (314 mg) and diisopropylethylamine (862 μl) were dissolved in methylene chloride (5 ml), chloro-N,N,N′,N′-tetramethylformamidinium hexafluorophosphate (337 mg) was added, and the mixture was stirred at room temperature for 15 hr. The reaction mixture was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate-hexane (3:7) was concentrated under reduced pressure to give 1-tert-butyl 3-methyl(3R,5S)-5-[{[1-(4-methoxybutyl)-1H-indol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-1,3-dicarboxylate (40 mg) as an oil. The obtained 1-tert-butyl 3-methyl(3R,5S)-5-[{[1-(4-methoxybutyl)-1H-indol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-1,3-dicarboxylate (40 mg) was dissolved in methanol (2 ml), 4M hydrogen chloride-ethyl acetate (2 ml) was added, and the mixture was stirred at room temperature for 15 hr. The reaction mixture was concentrated, and the residue was purified by reversed-phase preparative HPLC, and the object fraction was concentrated under reduced pressure. An aqueous sodium bicarbonate solution was added to the residue, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated to give the object product (13 mg).

Workup

  1. washa fraction eluted with ethyl acetate-hexane (3:7)
  2. concentrationwas concentrated under reduced pressure

Sources & evidence

ORD record
ord-c36a7090d74041a0a1acb27dc36f2475
Source dataset
uspto-grants-2015_06
Patent number
US09045436B2

Reaction notes

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