Sodium Hydroxide → 1-(2-Chloro-3-methylphenyl)-4-(3,4,5-trimethoxybenzyl)piperazine

HRID 1954023Notes

Reaction equation

HRID 1954023 reaction equation
[Cl-].[Al+3].[Cl-].[Cl-].[H-].[Al+3].[Li+].[H-].[H-].[H-].[Cl:11][C:12]1[C:17]([CH3:18])=[CH:16][CH:15]=[CH:14][C:13]=1[N:19]1[CH2:24][CH2:23][N:22]([C:25]([C:27]2[CH:32]=[C:31]([O:33][CH3:34])[C:30]([O:35][CH3:36])=[C:29]([O:37][CH3:38])[CH:28]=2)=O)[CH2:21][CH2:20]1.[OH-].[Na+]>C(OCC)C.O1CCCC1>[Cl:11][C:12]1[C:17]([CH3:18])=[CH:16][CH:15]=[CH:14][C:13]=1[N:19]1[CH2:20][CH2:21][N:22]([CH2:25][C:27]2[CH:32]=[C:31]([O:33][CH3:34])[C:30]([O:35][CH3:36])=[C:29]([O:37][CH3:38])[CH:28]=2)[CH2:23][CH2:24]1

Participants

7

Reactant 4

HCID 14798Sodium HydroxideHCID 6451240Aluminum(III) ChlorideHCID 15434661[4-(2-Chloro-3-methylphenyl)piperazine-1-yl]-(3,4,5-trimethoxyphenyl)methanoneHCID 21226445Aluminium lithium hydride

Product 1

HCID 102938041-(2-Chloro-3-methylphenyl)-4-(3,4,5-trimethoxybenzyl)piperazineYield 85.1%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of aluminum chloride (0.279 g, 2.09 mmol) in anhydrous diethyl ether (20 mL) is added dropwise to a suspension of lithium aluminum hydride (0.238 g, 6.27 mmol) in anhydrous tetrahydrofuran (20 mL) at 0° C. and stirred for 0.5 hour. To this mixture is added dropwise a solution of [4-(2-chloro-3-methylphenyl)piperazine-1-yl]-(3,4,5-trimethoxyphenyl)methanone (2.12 g, 5.23 mmol) in anhydrous tetrahydrofuran (20 mL). The suspension is stirred for 2 hours at 0° C., followed by dropwise addition of 2N sodium hydroxide. The mixture is filtered through Celite and concentrated in vacuo. The resulting product is purified by MPLC on silica gel eluting with 40% ethyl acetate/hexane to give 1.74 g of the title compound as a white solid; mp 112-113° C.

Workup

  1. stirringThe suspension is stirred for 2 hours at 0° C.
  2. filtrationThe mixture is filtered through Celite
  3. concentrationconcentrated in vacuo
  4. customThe resulting product is purified by MPLC on silica gel eluting with 40% ethyl acetate/hexane

Sources & evidence

ORD record
ord-e1c47939b4cc4425a4ffe3de71aa38df
Source dataset
uspto-grants-2000_09
Patent number
US06121267

Reaction notes

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