Diisopropylethylamine → HCID 118307747, compound

HRID 718421Notes

Reaction equation

[CH3:1][CH:2]1[CH2:7][CH:6]([CH3:8])[CH2:5][NH:4][CH2:3]1.CCN(C(C)C)C(C)C.[Br:18][C:19]1[C:20](Cl)=[C:21]([C:27](=[O:34])[C:28]([O:30][CH:31]([CH3:33])[CH3:32])=[O:29])[C:22]([CH3:26])=[N:23][C:24]=1[CH3:25]>CC#N>[Br:18][C:19]1[C:20]([N:4]2[CH2:5][CH:6]([CH3:8])[CH2:7][CH:2]([CH3:1])[CH2:3]2)=[C:21]([C:27](=[O:34])[C:28]([O:30][CH:31]([CH3:32])[CH3:33])=[O:29])[C:22]([CH3:26])=[N:23][C:24]=1[CH3:25]

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of 3,5-dimethylpiperidine (1.1 g, 9.86 mmol) and DIEA (3.1 mL, 18 mmol) in anhydrous CH3CN (40 mL) was added isopropyl 2-(5-bromo-4-chloro-2,6-dimethylpyridin-3-yl)-2-oxoacetate (3.0 g, 8.87 mmol) at rt. The resulting mixture was placed in a pre-heated oil bath (80° C.) and stirred for 24 h; cooled, concentrated, and charged (DCM) to a 120 g ISCO silica gel cartridge and gradient eluted (5-15% EtOAc/hexanes) using an Isolera chromatography station to give isopropyl 2-(5-bromo-4-(3,5-dimethylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-oxoacetate 756 mg (20%) as a mixture of diastereomers. A sample of the product subjected to prep HPLC on Waters-Atlantis column (30×100 mm S5) running 15 min gradient from 10-100% B (MeOH/water/TFA), yielding two bands. The major isomer. 1H NMR (500 MHz, CDCl3) δ 5.21-5.14 (m, 1H), 2.87 (br. s, 4H), 2.70 (s, 3H), 2.41 (s, 3H), 1.77-1.71 (m, 3H), 1.29 (d, J=6.2 Hz, 6H), 0.85 (d, J=6.6 Hz, 6H), 0.68 (q, J=11.9 Hz, 1H). UPLC (M+H)=413.15.

Workup

customThe resulting mixture was placed in a pre-heated oil bath
temperaturecooled
concentrationconcentrated
additioncharged (DCM) to a 120 g ISCO silica gel cartridge and gradient
washeluted (5-15% EtOAc/hexanes)

Sources & evidence

ORD record: ord-f4f721da63e14d4fa445805817f9e6a4
Source dataset: uspto-grants-2015_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09193720B2

Reaction notes

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