Diisopropylethylamine → (S)-tert-butyl 2-chloro-6-((1-methoxy-1-oxopropan-2-yl)amino)pyrimidine-4-carboxylate

HRID 1752396Notes

Reaction equation

[Cl:1][C:2]1[N:7]=[C:6]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH:5]=[C:4](Cl)[N:3]=1.Cl.[NH2:17][C@@H:18]([CH3:23])[C:19]([O:21][CH3:22])=[O:20].CCN(C(C)C)C(C)C>C(#N)C>[Cl:1][C:2]1[N:7]=[C:6]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH:5]=[C:4]([NH:17][C@@H:18]([CH3:23])[C:19]([O:21][CH3:22])=[O:20])[N:3]=1

Participants

Conditions

Temperature: 50 °C

Procedure

To a mixture of tert-butyl 2,6-dichloropyrimidine-4-carboxylate (0.310 g, 1.24 mmol) in acetonitrile (5 mL) was added (S)-methyl 2-aminopropanoate hydrochloride (0.177 g, 1.27 mmol) and iPr2NEt (0.48 mL, 2.8 mmol). The mixture was heated at 50° C. overnight then concentrated in vacuo. The residue was chromatographed over silica gel with 10-50% EtOAc in hexanes. The product fractions were evaporated in vacuo to yield (S)-tert-butyl 2-chloro-6-((1-methoxy-1-oxopropan-2-yl)amino)pyrimidine-4-carboxylate as a colorless glass (0.347 g, 1.10 mmol, 89% yield). 1H NMR (400 MHz, DMSO-d6): 8.70 (1H, d, J=6.8 Hz), 7.12 (1H, s), 4.56-4.47 (1H, m), 3.65 (3H, s), 1.53 (9H, s), 1.39 (3H, d, J=7.2 Hz). LC/MS: m/z=316.2 [M+H]+.

Workup

concentrationthen concentrated in vacuo
customThe residue was chromatographed over silica gel with 10-50% EtOAc in hexanes
customThe product fractions were evaporated in vacuo

Sources & evidence

ORD record: ord-c575635abbf84e62b2cee85104dd05d5
Source dataset: uspto-grants-2015_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09163008B2

Reaction notes

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