2-(3-chloro-4-methanesulfonyl-phenyl)-3-cyclopentyl-N-[5-(2,5-dioxo-imidazolidin-4-ylidenemethyl)-pyrazin-2-yl]-propionamide → 2-(3-chloro-4-methanesulfonyl-phenyl)-3-cyclopentyl-N-[5-(2,5-dioxo-imidazolidin-4-ylmethyl)-pyrazin-2-yl]-propionamide

HRID 719882Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([CH:12]([CH2:30][CH:31]2[CH2:35][CH2:34][CH2:33][CH2:32]2)[C:13]([NH:15][C:16]2[CH:21]=[N:20][C:19]([CH:22]=[C:23]3[C:27](=[O:28])[NH:26][C:25](=[O:29])[NH:24]3)=[CH:18][N:17]=2)=[O:14])[CH:5]=[CH:6][C:7]=1[S:8]([CH3:11])(=[O:10])=[O:9]>C(O)C.[Pd]>[Cl:1][C:2]1[CH:3]=[C:4]([CH:12]([CH2:30][CH:31]2[CH2:32][CH2:33][CH2:34][CH2:35]2)[C:13]([NH:15][C:16]2[CH:21]=[N:20][C:19]([CH2:22][CH:23]3[C:27](=[O:28])[NH:26][C:25](=[O:29])[NH:24]3)=[CH:18][N:17]=2)=[O:14])[CH:5]=[CH:6][C:7]=1[S:8]([CH3:11])(=[O:10])=[O:9]

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of 2-(3-chloro-4-methanesulfonyl-phenyl)-3-cyclopentyl-N-[5-(2,5-dioxo-imidazolidin-4-ylidenemethyl)-pyrazin-2-yl]-propionamide (130 mg, 0.25 mmol) in ethanol (5 mL) was treated with 10% palladium on activated carbon (260 mg). The reaction mixture was stirred under hydrogen (65 psi) at 25° C. for 2 d. The catalyst was then filtered off through a pad of celite, and the celite pad was washed well with ethanol. The filtrate was concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230–400 mesh, 80%–100% ethyl acetate/hexanes) afforded 2-(3-chloro-4-methanesulfonyl-phenyl)-3-cyclopentyl-N-[5-(2,5-dioxo-imidazolidin-4-ylmethyl)-pyrazin-2-yl]-propionamide (20 mg, 15%) as a white solid: LC-MS m/e 520 (MH+).

Workup

filtrationThe catalyst was then filtered off through a pad of celite
washthe celite pad was washed well with ethanol
concentrationThe filtrate was concentrated in vacuo

Sources & evidence

ORD record: ord-1270ea38081349aaa1361bbc8440ee26
Source dataset: uspto-grants-2006_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07132425B2

Reaction notes

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