Benzyl Bromide → 4-{2-[1-Benzyl-3-(1-tert-butoxycarbonylmethyl-piperidin-4-yl)-1H-indazol-6-yl]-(E)-vinyl}-piperidine-1-carboxylic acid tert-butyl ester

HRID 343416Notes

Reaction equation

HRID 343416 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11](/[CH:14]=[CH:15]/[C:16]2[CH:24]=[C:23]3[C:19]([C:20]([CH:25]4[CH2:30][CH2:29][N:28]([CH2:31][C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:27][CH2:26]4)=[N:21][NH:22]3)=[CH:18][CH:17]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH2:41](Br)[C:42]1[CH:47]=[CH:46][CH:45]=[CH:44][CH:43]=1>CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11](/[CH:14]=[CH:15]/[C:16]2[CH:24]=[C:23]3[C:19]([C:20]([CH:25]4[CH2:26][CH2:27][N:28]([CH2:31][C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:29][CH2:30]4)=[N:21][N:22]3[CH2:41][C:42]3[CH:47]=[CH:46][CH:45]=[CH:44][CH:43]=3)=[CH:18][CH:17]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 7498Benzyl BromideHCID 24758Sodium hydrideHCID 178451206HCID 178451206, compound

Product 1

HCID 675933674-{2-[1-Benzyl-3-(1-tert-butoxycarbonylmethyl-piperidin-4-yl)-1H-indazol-6-yl]-(E)-vinyl}-piperidine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

A solution of 4{-2-[3-(1-tert-butoxycarbonylmethyl-piperidin-4-yl)-1H-indazol-6-yl]-(E)-vinyl}-piperidine-1-carboxylic acid tert-butyl ester (152 mg, 0.29 mmol) in dry DMF (2 ml) under nitrogen was treated with sodium hydride (5 mg of a 60% dispersion in oil, 0.37 mmol) and stirred at +23° for 20 min. The solution was treated with a solution of benzyl bromide in dry DMF (0.1 ml of 3.14M solution, 0.314 mmol; Aldrich). The resulting mixture was stirred at +23° for 24 h and concentrated in vacuo. The residue was dissolved in dichloromethane (100 ml) and the solution washed with water (2×25 ml). The dried (MgSO4) organic layer was concentrated in vacuo onto silica (Merck 9385); purification by flash chromatography eluting with ether--cyclohexane (1:1) gave the title compound as a white foam (102 mg).

Workup

  1. stirringThe resulting mixture was stirred at +23° for 24 h
  2. concentrationconcentrated in vacuo
  3. dissolutionThe residue was dissolved in dichloromethane (100 ml)
  4. washthe solution washed with water (2×25 ml)
  5. dry with materialThe dried (MgSO4) organic layer
  6. concentrationwas concentrated in vacuo onto silica (Merck 9385)
  7. custompurification by flash chromatography
  8. washeluting with ether--cyclohexane (1:1)

Sources & evidence

ORD record
ord-2fa7db5c50c74e6fb8e96037a1ba9e46
Source dataset
uspto-grants-1999_01
Patent number
US05861414

Reaction notes

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