Ethanol → (4S,5R)-3-(5-amino-2-bromobenzyl)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one

HRID 1994636Notes

Reaction equation

[F:1][C:2]([F:32])([F:31])[C:3]1[CH:4]=[C:5]([C@H:13]2[O:17][C:16](=[O:18])[N:15]([CH2:19][C:20]3[CH:25]=[C:24]([N+:26]([O-])=O)[CH:23]=[CH:22][C:21]=3[Br:29])[C@H:14]2[CH3:30])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.[Sn](Cl)Cl.C(O)C>O>[NH2:26][C:24]1[CH:23]=[CH:22][C:21]([Br:29])=[C:20]([CH:25]=1)[CH2:19][N:15]1[C@@H:14]([CH3:30])[C@@H:13]([C:5]2[CH:6]=[C:7]([C:9]([F:10])([F:11])[F:12])[CH:8]=[C:3]([C:2]([F:31])([F:32])[F:1])[CH:4]=2)[O:17][C:16]1=[O:18]

Participants

Conditions

Temperature: 20 °C

Procedure

A mixture of (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-(2-bromo-5-nitrobenzyl)-4-methyl-1,3-oxazolidin-2-one (614 mg, 1.17 mmol), tin(II) chloride dehydrate (1.314 g, 5.823 mmol) and ethanol (3 mL) was stirred at 20° C. for 36 h. Reaction crude was worked up with water. The resulting mixture was extracted with EtOAc and dried over Na2SO4. The titled compound was obtained as a glassy material after SiO2 purification (Biotage 40+M, gradient, 0% to 35% EtOAc in hexanes). LC-MS: 499.05 (M+1)+. 1H NMR (CDCl3, 500 MHz) δ 7.88 (s, 1H), 7.77 (s, 2H), 7.31 (d, J=8.5, 1H), 6.77 (d, J=2.7, 1H), 6.54 (dd, J=8.5, 2.7 Hz, 1H), 5.69 (d, J=8.0 Hz, 1H), 4.77 (d, J=15.3, 1H), 4.29 (d, J=15.3 Hz, 1H), 4.05-4.12 (m, 1H), 0.79 (d, J=6.4 Hz, 3H).

Workup

customReaction crude
extractionThe resulting mixture was extracted with EtOAc
dry with materialdried over Na2SO4

Sources & evidence

ORD record: ord-c341e06d043347b0bb5ac9e67905b133
Source dataset: uspto-grants-2010_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07652049B2

Reaction notes

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