Diisopropylethylamine → (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-{[5-bromo-2-(3,3-difluoroazetidin-1-yl)pyrimidin-4-yl]methyl}-4-methyl-1,3-oxazolidin-2-one

HRID 531229Notes

Reaction equation

[F:1][C:2]([F:33])([F:32])[C:3]1[CH:4]=[C:5]([C@H:13]2[O:17][C:16](=[O:18])[N:15]([CH2:19][C:20]3[C:25]([Br:26])=[CH:24][N:23]=[C:22](S(C)(=O)=O)[N:21]=3)[C@H:14]2[CH3:31])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.[F:34][C:35]1([F:39])[CH2:38][NH:37][CH2:36]1.C(N(C(C)C)CC)(C)C>C1COCC1>[F:1][C:2]([F:33])([F:32])[C:3]1[CH:4]=[C:5]([C@H:13]2[O:17][C:16](=[O:18])[N:15]([CH2:19][C:20]3[C:25]([Br:26])=[CH:24][N:23]=[C:22]([N:37]4[CH2:38][C:35]([F:39])([F:34])[CH2:36]4)[N:21]=3)[C@H:14]2[CH3:31])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-{[5-bromo-2-(methylsulfonyl)pyrimidin-4-yl]methyl}-4-methyl-1,3-oxazolidin-2-one (Step A, 2.5 g, 4.45 mmol), and 3,3-difluoroazetidine (1.73 g, 13.34 mmol) in THF (40 mL) was added diisopropylethylamine (3.88 mL, 22.23 mmol). It was stirred at 60° C. for 15 minutes at which time complete conversion by LCMS was noted. The solvent was evaporated, and the residue was purified on a silica gel column, eluting with 50% ethyl acetate in hexanes to get the title compound (2.2 g, 86% yield) as a white solid. LCMS (M+H)+: 577.1; 575.2. 1H NMR (CDCl3, 500 MHz): δ 8.38 (s, 1H), 7.93 (s, 1H), 7.81 (s, 2H), 5.82 (d, J=8.5 Hz, 1H), 4.84 (d, J=18.0 Hz, 1H), 4.48 (m, 4H), 4.40 (m, 1H), 4.23 (d, J=18.0 Hz, 1H), 0.83 (d, J=6.5 Hz, 3H).

Workup

customThe solvent was evaporated
customthe residue was purified on a silica gel column
washeluting with 50% ethyl acetate in hexanes

Sources & evidence

ORD record: ord-14e6c92b2a6f4b11ba0341dce1f78f1e
Source dataset: uspto-grants-2016_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09353101B2

Reaction notes

Loading…