(Diethylamino)sulfur trifluoride → 4-Fluoro-1-{4-[2-(2-hydroxy-phenyl)-7-methyl-quinazolin-4-yl]-piperazin-1-yl}-4-methyl-pent-2-en-1-one

HRID 2079277Notes

Reaction equation

O[C:2]([CH3:32])([CH3:31])[CH:3]=[CH:4][C:5]([N:7]1[CH2:12][CH2:11][N:10]([C:13]2[C:22]3[C:17](=[CH:18][C:19]([CH3:23])=[CH:20][CH:21]=3)[N:16]=[C:15]([C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[OH:30])[N:14]=2)[CH2:9][CH2:8]1)=[O:6].C(N(S(F)(F)[F:39])CC)C>C(Cl)Cl.O>[F:39][C:2]([CH3:32])([CH3:31])[CH:3]=[CH:4][C:5]([N:7]1[CH2:12][CH2:11][N:10]([C:13]2[C:22]3[C:17](=[CH:18][C:19]([CH3:23])=[CH:20][CH:21]=3)[N:16]=[C:15]([C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[OH:30])[N:14]=2)[CH2:9][CH2:8]1)=[O:6]

Participants

Conditions

Temperature: -78 °C

Procedure

To 4-hydroxy-1-{4-[2-(2-hydroxy-phenyl)-7-methyl-quinazolin-4-yl]-piperazin-1-yl}-4-methyl-pent-2-en-1-one (330 mg, 0.76 mmol) at −78° C. in 3 mL of CH2Cl2 was added (diethylamino)sulfur trifluoride (185 mg, 1.15 mmol). The reaction mixture was stirred −78° C. for 2.5 h. The reaction mixture was diluted with 10 mL of water and 10 mL of CH2Cl2. The organic layer was separated and dried over Na2SO4, and the solvent was removed under reduced pressure to give an oil. The residue was subjected to purification by normal phase LC using 10-100% EtOAc-hexanes to give 4-fluoro-1-{4-[2-(2-hydroxy-phenyl)-7-methyl-quinazolin-4-yl]-piperazin-1-yl}-4-methyl-pent-2-en-1-one (133 mg, 40% yield). LC/MS: m/z 435.4.3 (M+H)+ at 2.92 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Workup

customThe organic layer was separated
dry with materialdried over Na2SO4
customthe solvent was removed under reduced pressure
customto give an oil
customThe residue was subjected to purification by normal phase LC

Sources & evidence

ORD record: ord-bdb1f1d003904c078f88fd4a02997629
Source dataset: uspto-grants-2011_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07928107B2

Reaction notes

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