3-Chloro-2-chloromethyl-1-propene → Benzyl tert-butyl 4-methylidenepyrazolidine-1,2-dicarboxylate
Reaktionsgleichung
[H-].[Na+].[C:3]([NH:13][NH:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])([O:5][CH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)=[O:4].Cl[CH2:23][C:24]([CH2:26]Cl)=[CH2:25]>CN(C=O)C>[C:18]([O:17][C:15]([N:14]1[CH2:26][C:24](=[CH2:23])[CH2:25][N:13]1[C:3]([O:5][CH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)=[O:4])=[O:16])([CH3:21])([CH3:20])[CH3:19]Komponenten
5
Versuchsvorschrift
To a suspension of NaH (3.81 g, 95.4 mmol) in DMF (80 mL) is add dropwise a solution of N-Cbz-N′-Boc-hydrazine (12.1 g, 45.4 mmol) in DMF (20 mL). The reaction mixture is stirred about 20 minutes and 3-chloro-2-chloromethyl-propene ( 5.8 mL, 50 mmol) is added dropwise and the reaction is allowed to stir at room temperature unit the reaction is complete by TLC. The reaction solution is partitioned between ethyl acetate and water, the water layer being extracted several times more with solvent. The combined organic layers are dried, filtered, and concentrated to afford the desired product as a clear oil which is used without further purification.
Aufarbeitung
- stirringto stir at room temperature unit the reaction
- customThe reaction solution is partitioned between ethyl acetate and water
- extractionthe water layer being extracted several times more with solvent
- customThe combined organic layers are dried
- filtrationfiltered
- concentrationconcentrated
Quellen und Nachweise
- ORD-Eintrag
- ord-9728930f90f147348e0f466b92e99485
- Quelldatensatz
- uspto-grants-2003_05
- Patentnummer
- US06566357B1
Notizen zur Reaktion
Wird geladen…