1-(4-Chlorophenyl)piperazine → {2-[4-(4-chlorophenyl)piperazin-1-yl]-5,5-dioxo-6,7-dihydro-5H-5lambda6-thieno[3,2-d]pyrimidin-4-yl}propylamine

HRID 1805985Notes

Reaction equation

Cl[C:2]1[N:3]=[C:4]([CH2:13][CH2:14][CH2:15][NH2:16])[C:5]2[S:10](=[O:12])(=[O:11])[CH2:9][CH2:8][C:6]=2[N:7]=1.[Cl:17][C:18]1[CH:23]=[CH:22][C:21]([N:24]2[CH2:29][CH2:28][NH:27][CH2:26][CH2:25]2)=[CH:20][CH:19]=1>O1CCOCC1>[Cl:17][C:18]1[CH:19]=[CH:20][C:21]([N:24]2[CH2:29][CH2:28][N:27]([C:2]3[N:3]=[C:4]([CH2:13][CH2:14][CH2:15][NH2:16])[C:5]4[S:10](=[O:12])(=[O:11])[CH2:9][CH2:8][C:6]=4[N:7]=3)[CH2:26][CH2:25]2)=[CH:22][CH:23]=1

Participants

Conditions

Temperature: 150 °C

Procedure

0.262 g (1.00 mmol) of (2-chloro-5,5-dioxo-6,7-dihydro-5H-5λ6-thieno[3,2-d]pyrimidin-4-yl)propylamine (II) and 0.433 g (2.20 mmol) of 1-(4-chlorophenyl)piperazine are placed in 4.50 mL of dioxane, then heated to 150° C. in the microwave for 0.75 hours. Then the reaction mixture is concentrated by evaporation, the residue is treated with water. It is suction filtered, washed with water, and dried. The product which is not yet clean is purified by chromatography (column: 10 g Chromabond SiOH cartridge, solvent: petroleum ether/ether 1:1). Corresponding fractions are combined and concentrated by evaporation. 0.295 g of product III (70%) is obtained as a powder (m.p. 243° C.-245° C.).

Workup

concentrationThen the reaction mixture is concentrated by evaporation
additionthe residue is treated with water
filtrationfiltered
washwashed with water
customdried
customThe product which is not yet clean is purified by chromatography (column: 10 g Chromabond SiOH cartridge, solvent: petroleum ether/ether 1:1)
concentrationconcentrated by evaporation

Sources & evidence

ORD record: ord-19d648356c6540b79419a78a436c1e3c
Source dataset: uspto-grants-2013_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08354531B2

Reaction notes

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