Diisopropylethylamine → 4-{2-[5-Bromo-4-(4-cyclopropylcarbamoylbenzo[b]thiophen-2-yl)-pyrimidin-2-ylamino]-ethyl}-4-methylpiperidine-1-carboxylic acid tert-butyl ester

HRID 1986290Notes

Reaction equation

HRID 1986290 reaction equation
[CH:1]1([NH:4][C:5]([C:7]2[C:15]3[CH:14]=[C:13]([C:16]4[C:21]([Br:22])=[CH:20][N:19]=[C:18](Cl)[N:17]=4)[S:12][C:11]=3[CH:10]=[CH:9][CH:8]=2)=[O:6])[CH2:3][CH2:2]1.[C:24]([O:28][C:29]([N:31]1[CH2:36][CH2:35][C:34]([CH2:38][CH2:39][NH2:40])([CH3:37])[CH2:33][CH2:32]1)=[O:30])([CH3:27])([CH3:26])[CH3:25].C(N(C(C)C)CC)(C)C>O1CCOCC1>[C:24]([O:28][C:29]([N:31]1[CH2:36][CH2:35][C:34]([CH2:38][CH2:39][NH:40][C:18]2[N:17]=[C:16]([C:13]3[S:12][C:11]4[CH:10]=[CH:9][CH:8]=[C:7]([C:5](=[O:6])[NH:4][CH:1]5[CH2:3][CH2:2]5)[C:15]=4[CH:14]=3)[C:21]([Br:22])=[CH:20][N:19]=2)([CH3:37])[CH2:33][CH2:32]1)=[O:30])([CH3:27])([CH3:26])[CH3:25]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 66660873Tert-butyl 4-(2-aminoethyl)-4-methylpiperidine-1-carboxylateHCID 866253432-(5-Bromo-2-chloropyrimidin-4-yl)-benzo[b]thiophene-4-carboxylic acid cyclopropylamide

Product 1

HCID 688568944-{2-[5-Bromo-4-(4-cyclopropylcarbamoylbenzo[b]thiophen-2-yl)-pyrimidin-2-ylamino]-ethyl}-4-methylpiperidine-1-carboxylic acid tert-butyl esterYield 100.1%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

A stirred mixture of 2-(5-bromo-2-chloropyrimidin-4-yl)-benzo[b]thiophene-4-carboxylic acid cyclopropylamide (400 mg, 0.979 mmol), 4-(2-aminoethyl)-4-methyl-piperidine-1-carboxylic acid tert-butyl ester (474 mg, 1.96 mmol) and diisopropylethylamine (253 mg, 1.96 mmol) in 1,4-dioxane (10 mL) is heated at 90° C. under nitrogen for 18 hours. At room temperature the mixture is concentrated and the crude product is chromatographed on silica gel, eluting with 3% 2 M NH3/MeOH in dichloromethane, to give 602 mg of 4-{2-[5-bromo-4-(4-cyclopropylcarbamoylbenzo[b]thiophen-2-yl)-pyrimidin-2-ylamino]-ethyl}-4-methylpiperidine-1-carboxylic acid tert-butyl ester. It is then subject to deprotection by dissolving the material (132 mg, 0.220 mmol) in MeOH (10 mL) and dichloromethane (5 mL) and bubbling anhydrous HCl gas for 5 minutes. The hot, yellow solution is allowed to sit at room temperature for 1.5 hours, then concentrated to give the title compound as a yellow solid (126 mg, 100% yield). ES+(m/z) 514 (79Br) and 516 (81Br) [M(free base)+H].

Workup

  1. concentrationAt room temperature the mixture is concentrated
  2. customthe crude product is chromatographed on silica gel
  3. washeluting with 3% 2 M NH3/MeOH in dichloromethane

Sources & evidence

ORD record
ord-6b1a1bbce3a847559a3b35f82513891a
Source dataset
uspto-grants-2009_06
Patent number
US07547691B2

Reaction notes

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