Diisopropylethylamine → (4R)-4-((R)-1-(tert-butoxy)ethyl)-3-(2-((1-(5-(4-chlorophenyl)oxazol-2-yl)ethyl)amino)-5-fluoropyrimidin-4-yl)oxazolidin-2-one

HRID 57485

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:12][C:11]([C@@H:13]([NH2:15])[CH3:14])=[N:10][CH:9]=2)=[CH:4][CH:3]=1.[C:16]([O:20][C@@H:21]([C@H:23]1[CH2:27][O:26][C:25](=[O:28])[N:24]1[C:29]1[C:34]([F:35])=[CH:33][N:32]=[C:31](F)[N:30]=1)[CH3:22])([CH3:19])([CH3:18])[CH3:17].C(N(C(C)C)C(C)C)C>CS(C)=O.CCOC(C)=O>[C:16]([O:20][C@@H:21]([C@H:23]1[CH2:27][O:26][C:25](=[O:28])[N:24]1[C:29]1[C:34]([F:35])=[CH:33][N:32]=[C:31]([NH:15][CH:13]([C:11]2[O:12][C:8]([C:5]3[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=3)=[CH:9][N:10]=2)[CH3:14])[N:30]=1)[CH3:22])([CH3:17])([CH3:18])[CH3:19]

Participants

Conditions

Temperature: 120 °C

Procedure

To a solution of (S)-1-(5-(4-chlorophenyl)oxazol-2-yl)ethanamine 75 mg, 0.337 mmol) and (R)-4-((R)-1-(tert-butoxy)ethyl)-3-(2,5-difluoropyrimidin-4-yl)oxazolidin-2-one (101 mg, 0.337 mmol) in DMSO (1 ml) was added N-ethyl-N-isopropylpropan-2-amine (2 eq, 0.118 mL, 0.674 mmol) and heated in a microwave at 120° C. for 2 hours. Dilute with EtOAc (25 ml), wash with water (25 ml), brine (25 ml), concentrate in vacuo. Flash column chromatography (silica, 40 g) eluting w/0-10% EtOAc/DCM afforded 124 mg yellow foam: 1H NMR (400 MHz, CDCl3) δ 8.25 (d, J=2.8 Hz, 1H), 7.61-7.49 (m, 2H), 7.45-7.36 (m, 2H), 7.28 (d, J=6.2 Hz, 1H), 5.65 (d, J=8.9 Hz, 1H), 5.43-5.27 (m, 1H), 4.69 (qd, J=5.6, 2.9 Hz, 1H), 4.62-4.35 (m, 2H), 4.23-4.01 (m, 1H), 1.68 (d, J=12.8 Hz, 2H), 1.26-1.16 (m, 2H), 1.12 (s, 8H), 1.05 (d, J=6.4 Hz, 3H). HRMS(C) tR=1.55 min; m/z 503.1736

Workup

washwash with water (25 ml), brine (25 ml)
concentrationconcentrate in vacuo
washFlash column chromatography (silica, 40 g) eluting w/0-10% EtOAc/DCM

Sources & evidence

ORD record: ord-512da82b60fb4147b9b52e2c4dd134c0
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09434719B2

Linked notes

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