Water → 2-[(4-{2-[(6-Chloropyridazin-3-yl)amino]ethyl}-1,3-thiazol-2-yl)thio]-2-methylpropionic acid tert-butyl ester

HRID 914356

Reaction equation

[C:1]([O:5][C:6](=[O:19])[C:7]([S:10][C:11]1[S:12][CH:13]=[C:14]([CH2:16][CH2:17][NH2:18])[N:15]=1)([CH3:9])[CH3:8])([CH3:4])([CH3:3])[CH3:2].[Cl:20][C:21]1[N:22]=[N:23][C:24](Cl)=[CH:25][CH:26]=1.C(N(C(C)C)CC)(C)C.O>CN1CCCC1=O>[C:1]([O:5][C:6](=[O:19])[C:7]([S:10][C:11]1[S:12][CH:13]=[C:14]([CH2:16][CH2:17][NH:18][C:24]2[N:23]=[N:22][C:21]([Cl:20])=[CH:26][CH:25]=2)[N:15]=1)([CH3:9])[CH3:8])([CH3:2])([CH3:4])[CH3:3]

Participants

Conditions

Temperature: 130 °C

Procedure

2-{[4-(2-Aminoethyl)-1,3-thiazol-2-yl]thio}-2-methylpropionic acid tert-butyl ester (5.0 g) synthesized in Example 7 and 3,6-dichloropyridazine (4.92 g) were dissolved in N-methylpyrrolidone (25 mL), diisopropylethylamine (4.27 g) was added, and the mixture was heated at 130° C. with stirring for 8 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (elution solvent; hexane:ethyl acetate=2:1 to 1:1) to give the title compound (5.5 g) as a white solid.

Workup

extractionthe mixture was extracted with ethyl acetate
washThe organic layer was washed with saturated brine
dry with materialdried over anhydrous sodium sulfate
customThe solvent was evaporated under reduced pressure
customthe residue was purified by silica gel chromatography (elution solvent; hexane:ethyl acetate=2:1 to 1:1)

Sources & evidence

ORD record: ord-cbc7d7548e734800954ecd370ab51faa
Source dataset: uspto-grants-2011_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08026370B2

Linked notes

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