Triethylamine → 3,5-Dimethyl-isoxazole-4-sulfonic Acid 7-{[1-(piperidine-4-carbonyl)-piperidin-4-ylmethyl]-propyl-amino}-5,6,7,8-tetrahydro-naphthalen-2-yl Ester

HRID 1168895Notes

Reaction equation

HRID 1168895 reaction equation
[NH:1]1[CH2:6][CH2:5][CH:4]([CH2:7][N:8]([CH2:30][CH2:31][CH3:32])[CH:9]2[CH2:18][C:17]3[CH:16]=[C:15]([O:19][S:20]([C:23]4[C:24]([CH3:29])=[N:25][O:26][C:27]=4[CH3:28])(=[O:22])=[O:21])[CH:14]=[CH:13][C:12]=3[CH2:11][CH2:10]2)[CH2:3][CH2:2]1.C(OC([N:40]1[CH2:45][CH2:44][CH:43]([C:46](O)=[O:47])[CH2:42][CH2:41]1)=O)(C)(C)C.CCN=C=NCCCN(C)C.Cl.C(N(CC)CC)C>ClCCl>[NH:40]1[CH2:45][CH2:44][CH:43]([C:46]([N:1]2[CH2:6][CH2:5][CH:4]([CH2:7][N:8]([CH2:30][CH2:31][CH3:32])[CH:9]3[CH2:18][C:17]4[CH:16]=[C:15]([O:19][S:20]([C:23]5[C:24]([CH3:29])=[N:25][O:26][C:27]=5[CH3:28])(=[O:22])=[O:21])[CH:14]=[CH:13][C:12]=4[CH2:11][CH2:10]3)[CH2:3][CH2:2]2)=[O:47])[CH2:42][CH2:41]1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 3928711-(tert-Butoxycarbonyl)-4-piperidinecarboxylic acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 213627933,5-Dimethyl-isoxazole-4-sulfonic acid 7-(piperidin-4-ylmethyl-propyl-amino)-5,6,7,8-tetrahydro-naphthalen-2-yl ester

Product 1

HCID 102185313,5-Dimethyl-isoxazole-4-sulfonic Acid 7-{[1-(piperidine-4-carbonyl)-piperidin-4-ylmethyl]-propyl-amino}-5,6,7,8-tetrahydro-naphthalen-2-yl EsterYield 89.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Under an inert atmosphere 3,5-dimethyl-isoxazole-4-sulfonic acid 7-(piperidin-4-ylmethyl-propyl-amino)-5,6,7,8-tetrahydro-naphthalen-2-yl ester (400 mg, 0.87 mmol), piperidine-1,4-dicarboxylic acid mono-tert-butyl ester (199 mg, 0.87 mmol, 1 eq.), EDCl (166 mg, 0.87 mmol, 1 eq.), triethylamine (0.25 mL, 1.79 mmol, 2 eq.), and dichloromethane (35 mL) were combined. The mixture was stirred at room temperature for 48 h and then concentrated in vacuo. The residue was taken up in EtOAc (50 mL) and washed with water (30 mL), 1 N NaOH (30 mL), brine (30 mL), and then dried (MgSO4). The solution was filtered and concentrated to afford a yellow oil. The oil was flash chromatographed on silica gel eluting with 20% acetone in hexanes to afford the protected amine as a foam (447 mg), which was deprotected with trifluoroacetic acid, as described herein, to afford 3,5-dimethyl-isoxazole-4-sulfonic acid 7-{[1-(piperidine-4-carbonyl)-piperidin-4-ylmethyl]-propyl-amino}-5,6,7,8-tetrahydro-naphthalen-2-yl ester (320 mg), 114M+H]+=609.

Workup

  1. concentrationconcentrated in vacuo
  2. washwashed with water (30 mL), 1 N NaOH (30 mL), brine (30 mL)
  3. dry with materialdried (MgSO4)
  4. filtrationThe solution was filtered
  5. concentrationconcentrated
  6. customto afford a yellow oil
  7. customchromatographed on silica gel eluting with 20% acetone in hexanes

Sources & evidence

ORD record
ord-dcd05f6fa02845779f0198e43e5a95a4
Source dataset
uspto-grants-2003_09
Patent number
US06627644B2

Reaction notes

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