1-Hydroxybenzotriazole → HCID 25165720, compound

HRID 1178149Notes

Reaction equation

C1C=CC2N(O)N=NC=2C=1.CCN(C(C)C)C(C)C.[C:20]1([C:26]2[O:30][N:29]=[C:28]([C:31]([OH:33])=O)[CH:27]=2)[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.CCN=C=NCCCN(C)C.Cl.Cl.[NH2:47][CH2:48][C:49]([N:51]1[CH2:56][CH2:55][N:54]([C:57](=[O:67])[C:58]2[CH:63]=[C:62]([O:64][CH3:65])[CH:61]=[CH:60][C:59]=2[Br:66])[CH2:53][CH2:52]1)=[O:50]>CN(C=O)C.O>[Br:66][C:59]1[CH:60]=[CH:61][C:62]([O:64][CH3:65])=[CH:63][C:58]=1[C:57]([N:54]1[CH2:53][CH2:52][N:51]([C:49](=[O:50])[CH2:48][NH:47][C:31]([C:28]2[CH:27]=[C:26]([C:20]3[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=3)[O:30][N:29]=2)=[O:33])[CH2:56][CH2:55]1)=[O:67]

Participants

Conditions

Temperature: 10 °C

Procedure

HOBt (21.5 mg, 0.16 mmol) and DIPEA (66 mg, 0.51 mmol) were added to a stirred solution of 5-phenyl-isoxazole-3-carboxylic acid (24 mg, 0.13 mmol) in DMF (1.0 mL). The mixture was then cooled to 10° C. and EDCI.HCl (30.5 mg, 0.16 mmol) followed by 2-amino-1-[4-(2-bromo-5-methoxy-benzoyl)-piperazin-1-yl]-ethanone hydrochloride (50 mg, 0.13 mmol) were added. The reaction mixture was then stirred at room temperature overnight. Water was added, and the resulting precipitate was isolated by filtration under reduced pressure and dried to afford 5-phenyl-isoxazole-3-carboxylic acid {2-[4-(2-bromo-5-methoxy-benzoyl)-piperazin-1-yl]-2-oxo-ethyl}-amide as a solid in 53.8% yield. LC-MS purity: 92.97%, 1H-NMR (DMSO): δ 8.7 (t, 1H), 8.0 (m, 2H), 7.58 (m, 4H), 7.41 (s, 1H), 7.0 (m, 2H), 4.2 (m, 2H), 3.78 (s, 3H), 3.5 (m, 6H), 3.2 (m, 2H).

Workup

additionwere added
customthe resulting precipitate was isolated by filtration under reduced pressure
customdried

Sources & evidence

ORD record: ord-19cd8e5419064277bc7543a8635b4ad7
Source dataset: uspto-grants-2010_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07842696B2

Reaction notes

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