Diisopropylethylamine → 4-{3-[5-Methyl-4-(6-methylcarbamoyl-benzo[b]thiophen-2-yl)-pyrimidin-2-ylamino]-propyl}-piperazine-1-carboxylic acid tert-butyl ester

HRID 1986293Notes

Reaction equation

HRID 1986293 reaction equation
[CH3:1][NH:2][C:3]([C:5]1[CH:6]=[CH:7][C:8]2[CH:12]=[C:11]([C:13]3[C:18]([CH3:19])=[CH:17][N:16]=[C:15](Cl)[N:14]=3)[S:10][C:9]=2[CH:21]=1)=[O:4].[C:22]([O:26][C:27]([N:29]1[CH2:34][CH2:33][N:32]([CH2:35][CH2:36][CH2:37][NH2:38])[CH2:31][CH2:30]1)=[O:28])([CH3:25])([CH3:24])[CH3:23].C(N(C(C)C)CC)(C)C>O1CCOCC1>[C:22]([O:26][C:27]([N:29]1[CH2:30][CH2:31][N:32]([CH2:35][CH2:36][CH2:37][NH:38][C:15]2[N:14]=[C:13]([C:11]3[S:10][C:9]4[CH:21]=[C:5]([C:3](=[O:4])[NH:2][CH3:1])[CH:6]=[CH:7][C:8]=4[CH:12]=3)[C:18]([CH3:19])=[CH:17][N:16]=2)[CH2:33][CH2:34]1)=[O:28])([CH3:25])([CH3:24])[CH3:23]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 177509451-tert-Butyloxycarbonyl-4-(3-aminopropyl)piperazineHCID 866253852-(2-Chloro-5-methylpyrimidin-4-yl)-benzo[b]thiophene-6-carboxylic acid methylamide

Product 1

HCID 688590584-{3-[5-Methyl-4-(6-methylcarbamoyl-benzo[b]thiophen-2-yl)-pyrimidin-2-ylamino]-propyl}-piperazine-1-carboxylic acid tert-butyl esterYield 44%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
95 °C

Procedure

A mixture of 2-(2-chloro-5-methylpyrimidin-4-yl)-benzo[b]thiophene-6-carboxylic acid methylamide (263 mg, 0.830 mmol), 4-(3-aminopropyl)-piperazine-1-carboxylic acid tert-butyl ester (358 mg, 1.47 mmol) and diisopropylethylamine (0.44 mL) in 1,4-dioxane (10 mL) is heated at 95° C. for 20 hours. The solvent is removed after cooling and the residue is subjected to chromatography on silica gel, eluting with 2.0 M NH3/MeOH in dichloromethane 0-10%, to give 4-{3-[5-methyl-4-(6-methylcarbamoyl-benzo[b]thiophen-2-yl)-pyrimidin-2-ylamino]-propyl}-piperazine-1-carboxylic acid tert-butyl ester (191 mg, 44% yield). The intermediate is dissolved in THF (8 mL) and 5 N hydrochloric acid (5 mL) is added. The solution is heated at 70° C. for 4.5 hours and then cooled before evaporating the solvent. Methanol is added to the residue and the mixture is sonicated for 30 minutes. The solid is filtered and washed with diethyl ether, then dried in a vacuum oven at 50° C. for 18 hours to give the title compound (129 mg, 66% yield). ES+(m/z) 425 [M(free base)+H].

Workup

  1. customThe solvent is removed
  2. temperatureafter cooling
  3. washeluting with 2.0 M NH3/MeOH in dichloromethane 0-10%

Sources & evidence

ORD record
ord-891beb0057bb4aa99cfc00b9aa8b5643
Source dataset
uspto-grants-2009_06
Patent number
US07547691B2

Reaction notes

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