1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-(6-chloroimidazo[1,2-b]pyridazin-8-ylamino)-N-(1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridin-3-yl)benzamide

HRID 2239844Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([NH:11][C:12]2[CH:20]=[CH:19][C:15]([C:16]([OH:18])=O)=[CH:14][CH:13]=2)[C:5]2[N:6]([CH:8]=[CH:9][N:10]=2)[N:7]=1.[NH2:21][C:22]1[C:23](=[O:35])[N:24]([C:28]2[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=2)[CH:25]=[CH:26][CH:27]=1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>CC#N.CN(C=O)C>[Cl:1][C:2]1[CH:3]=[C:4]([NH:11][C:12]2[CH:13]=[CH:14][C:15]([C:16]([NH:21][C:22]3[C:23](=[O:35])[N:24]([C:28]4[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=4)[CH:25]=[CH:26][CH:27]=3)=[O:18])=[CH:19][CH:20]=2)[C:5]2[N:6]([CH:8]=[CH:9][N:10]=2)[N:7]=1

Participants

Conditions

Temperature: 50 °C

Procedure

To a 2 dram vial was added 4-(6-chloroimidazo[1,2-b]pyridazin-8-ylamino)benzoic acid (0.050 g, 0.17 mmol, prepared as described in Example XIV, step 1b), 3-amino-1-(4-fluorophenyl)pyridin-2(1H)-one (0.053 g, 0.26) from 1a-1 and 1a-2 described below, EDCI (0.050 g, 0.26 mmol), HOBt (0.035 g, 0.26 mmol), TEA (0.07 ml, 0.51 mmol), DMF (0.8 ml) and CH3CN (0.8 ml). the reaction was allowed to stir at 50° C. for 12 hrs. Upon cooling, the solvent was removed in vacuo and diluted with methanol (2 ml). The solution was purified by HPLC (20-100% methanol gradient), which yielded 0.0.12 g of 4-(6-chloroimidazo[1,2-b]pyridazin-8-ylamino)-N-(1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridin-3-yl)benzamide.

Workup

temperatureUpon cooling
customthe solvent was removed in vacuo
additiondiluted with methanol (2 ml)
customThe solution was purified by HPLC (20-100% methanol gradient), which

Sources & evidence

ORD record: ord-bab18b1f63e54980a032f87fdeab71eb
Source dataset: uspto-grants-2010_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07723336B2

Reaction notes

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