Water → 3-[Bis(tert-butoxycarbonyl)aminomethyl]-6-phenylpyridazine

HRID 2359811Notes

Reaction equation

Br[CH2:2][C:3]1[N:4]=[N:5][C:6]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)=[CH:7][CH:8]=1.[NH:15]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17].C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[C:26]([O:25][C:23]([N:15]([CH2:2][C:3]1[N:4]=[N:5][C:6]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)=[CH:7][CH:8]=1)[C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])=[O:24])([CH3:29])([CH3:28])[CH3:27]

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of 3-bromomethyl-6-phenylpyridazine (120 mg, 0.482 mmol) obtained in Reference Example 2-(a) in N,N-dimethylformamide (1.57 ml) were added di-tert-butyl iminodicarboxylate (127 mg, 0.585 mmol) and potassium carbonate (134 mg, 0.970 mmol), followed by stirring at 50° C. for 2 hours. After completion of the reaction, water was added to the reaction solution, followed by extraction with ethyl acetate. The separated organic layer was dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography (eluent; hexane:ethyl acetate=2:1→1:1 (V/V)), and fractions containing the desired compound were concentrated under reduced pressure to afford the title compound (180 mg) as a slightly yellow solid. (Yield: 97%)

Workup

additionwas added to the reaction solution
extractionfollowed by extraction with ethyl acetate
dry with materialThe separated organic layer was dried over anhydrous sodium sulfate
concentrationconcentrated under reduced pressure
additioncontaining the desired compound
concentrationwere concentrated under reduced pressure

Sources & evidence

ORD record: ord-758a4a0eba134c9d8bef620388914d09
Source dataset: uspto-grants-2014_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08685986B2

Reaction notes

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