Trifluoroacetic acid → HCID 57640339, compound

HRID 2111923Notes

Reaction equation

HRID 2111923 reaction equation
FC(F)(F)C(O)=O.C(OC([N:15]1[CH2:20][CH2:19][CH:18]([N:21]([CH2:27][C:28]2[O:29][C:30]3[CH:36]=[CH:35][CH:34]=[CH:33][C:31]=3[CH:32]=2)[CH2:22][CH2:23][CH:24]([CH3:26])[CH3:25])[CH2:17][CH2:16]1)=O)(C)(C)C>ClCCl>[CH3:25][CH:24]([CH3:26])[CH2:23][CH2:22][N:21]([CH2:27][C:28]1[O:29][C:30]2[CH:36]=[CH:35][CH:34]=[CH:33][C:31]=2[CH:32]=1)[CH:18]1[CH2:17][CH2:16][NH:15][CH2:20][CH2:19]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 68575168HCID 68575168, compound

Product 1

HCID 57640339HCID 57640339, compoundYield 87.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Trifluoroacetic acid (15 ml, 195 mmol) is added to a solution of 4-{[(benzofuran-2-yl)methyl]-(3-methylbutyl)-amino}-piperidine-1-carboxylic acid tert-butyl ester (1.17 g, 2.92 mmol) in dichloromethane (15 ml). The reaction is stirred overnight at room temperature. The reaction is concentrated and water added to the residue. The solution is loaded onto a SCX-2 (10 g) column and washed with water (20 ml) and methanol (20 ml). The product is then eluted off with 2M ammonia in methanol (30 ml) and concentrated on a rotary evaporator to yield (0.77 g) of N-(3-methylbutyl)-N-[(benzofuran-2-yl)methyl]piperidin-4-amine: mass spectrum (ion spray): m/z=301 (M+1); 1H NMR (CDCl3): δ=7.52-7.43 (2H, m), 7.25-7.16 (2H, m), 6.56 (1H, s), 3.81 (2H, s), 3.14 (2H, brd), 2.72-2.52 (5H, m), 1.86-1.75 (3H, brm), 1.64-1.34 (5H, m), 0.92-0.83 (6H, m).

Workup

  1. concentrationThe reaction is concentrated
  2. additionwater added to the residue
  3. washwashed with water (20 ml) and methanol (20 ml)
  4. washThe product is then eluted off with 2M ammonia in methanol (30 ml)
  5. concentrationconcentrated on a rotary evaporator

Sources & evidence

ORD record
ord-98342db8b83c4dbe8c53245ef81ff0d4
Source dataset
uspto-grants-2009_04
Patent number
US07521462B2

Reaction notes

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