1-[(3R)-pyrrolidin-3-yl]piperidine dihydrochloride → HCID 44125450, compound

HRID 1692033Notes

Reaction equation

[CH2:1]([NH:3][C:4]([C:6]1[CH:15]=[CH:14][C:9]2[NH:10][C:11](=S)[O:12][C:8]=2[CH:7]=1)=[O:5])[CH3:2].Cl.Cl.[NH:18]1[CH2:22][CH2:21][C@@H:20]([N:23]2[CH2:28][CH2:27][CH2:26][CH2:25][CH2:24]2)[CH2:19]1>C1(C)C=CC=CC=1.ClCCl>[CH2:1]([NH:3][C:4]([C:6]1[CH:15]=[CH:14][C:9]2[N:10]=[C:11]([N:18]3[CH2:22][CH2:21][C@@H:20]([N:23]4[CH2:24][CH2:25][CH2:26][CH2:27][CH2:28]4)[CH2:19]3)[O:12][C:8]=2[CH:7]=1)=[O:5])[CH3:2]

Participants

Conditions

Temperature: 130 °C

Procedure

N-Ethyl-2-thioxo-2,3-dihydrobenzo[d]oxazole-6-carboxamide (Example 93A, 56 mg, 0.253 mmol) and (R)-1-(pyrrolidin-3-yl)piperidine (Reference Example 5c, 39 mg, 253 mmol) were combined in toluene (1 mL) and heated to 130° C. for one hour. The reaction mixture was diluted with dichloromethane, washed with a 1 N aqueous solution of sodium hydroxide, and the organic layer was absorbed on silica gel. The crude mixture was purified using silica gel chromatography (12 g column) eluting with a gradient of methanol/dichloromethane (1-18%) to afford the title compound. 1H NMR (300 MHz, CDCl3) δ ppm 1.26 (t, J=7.34 Hz, 3 H) 1.40-1.53 (m, 2 H) 1.59-1.69 (m, 4 H) 1.89-2.07 (m, 1 H) 2.22-2.35 (m, 1 H) 2.36-2.60 (m, 4 H) 2.89-3.03 (m, 1 H) 3.42-3.58 (m, 3 H) 3.59-3.68 (m, 1 H) 3.82-3.92 (m, 1 H) 3.97 (dd, J=10.11, 7.34 Hz, 1 H) 5.98-6.11 (m, 1 H) 7.31 (d, J=8.33 Hz, 1 H) 7.53 (dd, J=8.33, 1.59 Hz, 1 H) 7.78 (d, J=1.59 Hz, 1 H); MS (ESI+) m/z 343.1 (M+H)+.

Workup

washwashed with a 1 N aqueous solution of sodium hydroxide
customthe organic layer was absorbed on silica gel
customThe crude mixture was purified
washeluting with a gradient of methanol/dichloromethane (1-18%)

Sources & evidence

ORD record: ord-1b91a29de2fd4a289e907186f86e5f8e
Source dataset: uspto-grants-2012_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08153813B2

Reaction notes

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