Triethylamine → Methanone, [(3R)-1-(4-amino-5-nitro-2-pyrimidinyl)-3-piperidinyl]-1-pyrrolidinyl-

HRID 931059Notes

Reaction equation

Cl[C:2]1[N:7]=[C:6]([NH2:8])[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][N:3]=1.Cl.[NH:13]1[CH2:18][CH2:17][CH2:16][C@@H:15]([C:19]([N:21]2[CH2:25][CH2:24][CH2:23][CH2:22]2)=[O:20])[CH2:14]1.Cl.Cl.NC1C=CC(N2CCC[C@@H](C(N3CCCC3)=O)C2)=NC=1N.C(N(CC)CC)C>CS(C)=O.C(OCC)(=O)C>[NH2:8][C:6]1[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][N:3]=[C:2]([N:13]2[CH2:18][CH2:17][CH2:16][C@@H:15]([C:19]([N:21]3[CH2:22][CH2:23][CH2:24][CH2:25]3)=[O:20])[CH2:14]2)[N:7]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of 2-chloro-5-nitropyrimidin-4-amine (670 mg, 3.84 mmol, 80% pure), (R)-piperidin-3-yl(pyrrolidin-1-yl)methanone hydrochloride (prepared by the method described in Steps 1 and 2 of Intermediate 1, 560 mg, 2.56 mmol) and triethylamine (0.761 mL, 5.46 mmol) in dimethylsulfoxide (5 mL) was heated to 100° C. for 5 h. The mixture was diluted with ethyl acetate (80 mL), washed with water and brine, dried over sodium sulfate and concentrated. The crude material was purified via flash chromatography (ethyl acetate/heptane: 40-70-100%) to afford (R)-(1-(4-amino-5-nitropyrimidin-2-yl)piperidin-3-yl)(pyrrolidin-1-yl)methanone as a yellow solid (420 mg). 1H NMR (500 MHz, DMSO-d6) δ 1.45 (t, 1H), 1.62 (d, 1H), 1.72-1.82 (m, 4H), 1.88 (d, 4H), 2.56 (br s, 1H), 2.90-3.04 (m, 2H), 3.28 (t, 2H), 3.37-3.62 (m, 2H), 4.59-4.87 (m, 2H), 8.00 (br s, 1H), 8.16 (br s, 1H), 8.90 (s, 1H); MS (ES+) (M+H) 321.2.

Workup

customprepared by the method
washwashed with water and brine
dry with materialdried over sodium sulfate
concentrationconcentrated
customThe crude material was purified via flash chromatography (ethyl acetate/heptane: 40-70-100%)

Sources & evidence

ORD record: ord-63ceb40ace2847449d9aaab732cb5115
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09296745B2

Reaction notes

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