Boron tribromide dichloromethane → Ethyl 2-(4-{[(3,4-dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}piperidin-1-yl)-4-(hydroxymethyl)-1,3-thiazole-5-carboxylate

HRID 2233974Notes

Reaction equation

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

Participants

Conditions

Temperature: -78 °C

Procedure

Ethyl 2-(4-{[(3,4-dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}piperidin-1-yl)-4-(methoxymethyl)-1,3-thiazole-5-carboxylate (Example 276; 50 mg; 0.105 mmol) was dissolved in anhydrous DCM and cooled to −78° C. 1 M Boron tribromide/DCM (105 μl; 0.105 mmol) was added dropwise. The mixture was stirred at −78° C. for 15 min, then at room temperature for 4 h. The mixture was diluted with DCM, washed with water and dried over Na2SO4. Organic phase was concentrated in vacuo giving the title compound (20 mg).

Workup

waitat room temperature for 4 h
washwashed with water
dry with materialdried over Na2SO4
concentrationOrganic phase was concentrated in vacuo

Sources & evidence

ORD record: ord-4083563f36ed43a699695bab4f572b01
Source dataset: uspto-grants-2010_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07709503B2

Reaction notes

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