Hydrazine hydrate (1:1) → (R)-ethyl 5-(2-(1-(3-aminopropyl)-5-fluoro-2-oxo-1,2-dihydropyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate

HRID 1426900Notes

Reaction equation

O=C1C2C(=CC=CC=2)C(=O)[N:3]1[CH2:12][CH2:13][CH2:14][N:15]1[CH:20]=[C:19]([F:21])[CH:18]=[C:17]([C@H:22]2[CH2:26][CH2:25][CH2:24][N:23]2[C:27]2[CH:32]=[CH:31][N:30]3[N:33]=[CH:34][C:35]([C:36]([O:38][CH2:39][CH3:40])=[O:37])=[C:29]3[N:28]=2)[C:16]1=[O:41].CO.C1COCC1.NN.O>O>[NH2:3][CH2:12][CH2:13][CH2:14][N:15]1[CH:20]=[C:19]([F:21])[CH:18]=[C:17]([C@H:22]2[CH2:26][CH2:25][CH2:24][N:23]2[C:27]2[CH:32]=[CH:31][N:30]3[N:33]=[CH:34][C:35]([C:36]([O:38][CH2:39][CH3:40])=[O:37])=[C:29]3[N:28]=2)[C:16]1=[O:41]

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of (R)-ethyl 5-(2-(1-(3-(1,3-dioxoisoindolin-2-yl)propyl)-5-fluoro-2-oxo-1,2-dihydropyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxylate (0.20 g, 0.36 mmol) in 1:1 MeOH/THF (12 mL) was added hydrazine-H2O (0.18 g, 3.6 mmol). The reaction mixture was heated at 50° C. for 24 hours. After cooling, the reaction mixture was poured into water and extracted with DCM (3×20 mL). The combined organics were dried (MgSO4), filtered, and concentrated to afford the desired product (0.11 g, 72% yield). MS (apci) m/z=429.0 (M+H).

Workup

temperatureAfter cooling
extractionextracted with DCM (3×20 mL)
dry with materialThe combined organics were dried (MgSO4)
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-63d0ef0efd5f416eb9bb6c380ca4de86
Source dataset: uspto-grants-2015_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08933084B2

Reaction notes

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