1-(3-Aminopropyl)-4-methylpiperazine → 2-{5-Methyl-2-[3-(4-methylpiperazin-1-yl)-propylamino]-pyrimidin-4-yl}-benzo[b]thiophene-6-carboxylic acid methyl ester

HRID 1986187

Reaction equation

[CH3:1][O: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].[NH2:22][CH2:23][CH2:24][CH2:25][N:26]1[CH2:31][CH2:30][N:29]([CH3:32])[CH2:28][CH2:27]1>O1CCOCC1>[CH3:1][O: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]([NH:22][CH2:23][CH2:24][CH2:25][N:26]4[CH2:27][CH2:28][N:29]([CH3:32])[CH2:30][CH2:31]4)[N:14]=3)[S:10][C:9]=2[CH:21]=1)=[O:4]

Participants

Conditions

Temperature: 90 °C

Procedure

A mixture of 2-(2-chloro-5-methylpyrimidin-4-yl)-benzo[b]thiophene-6-carboxylic acid methyl ester (2.08 g, 6.50 mmol) and 1-(3-aminopropyl)-4-methylpiperazine (3.00 g, 19.0 mmol) in 1,4-dioxane (40 mL) is heated at 90° C. for 20 hours. The solvent is evaporated and the resulting residue is subjected to chromatography on silica gel, eluting with 2M NH3/CH3OH in dichloromethane 0-8%, to give the title compound (1.30 g, 72% yield). ES+(m/z) 460 [M+H].

Workup

customThe solvent is evaporated
washeluting with 2M NH3/CH3OH in dichloromethane 0-8%

Sources & evidence

ORD record: ord-8a9f96bbd87b4881b66fd75a0abe2df2
Source dataset: uspto-grants-2009_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07547691B2

Linked notes

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