Triethylamine → [(E)-1-[3-[1-(7-fluoroquinolin-6-yl)ethyl]imidazo[1,2-b]pyridazin-6-yl]ethylideneamino]urea

HRID 456088Notes

Reaction equation

HRID 456088 reaction equation
[F:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][CH:8]=[N:9]2)=[CH:4][C:3]=1[CH:12]([C:14]1[N:18]2[N:19]=[C:20]([C:23](=O)[CH3:24])[CH:21]=[CH:22][C:17]2=[N:16][CH:15]=1)[CH3:13].Cl.[NH2:27][NH:28][C:29]([NH2:31])=[O:30].C(N(CC)CC)C>CO>[F:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][CH:8]=[N:9]2)=[CH:4][C:3]=1[CH:12]([C:14]1[N:18]2[N:19]=[C:20](/[C:23](=[N:27]/[NH:28][C:29]([NH2:31])=[O:30])/[CH3:24])[CH:21]=[CH:22][C:17]2=[N:16][CH:15]=1)[CH3:13]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 11236Semicarbazide hydrochlorideHCID 581905731-(3-(1-(7-Fluoroquinolin-6-yl)ethyl)imidazo[1,2-b]pyridazin-6-yl)ethanone

Product 1

HCID 71699891[(E)-1-[3-[1-(7-fluoroquinolin-6-yl)ethyl]imidazo[1,2-b]pyridazin-6-yl]ethylideneamino]ureaYield 54%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 1-(3-(1-(7-fluoroquinolin-6-yl)ethyl)imidazo[1,2-b]pyridazin-6-yl)ethanone (60 mg, 0.18 mmol) in methanol (10 ml) was added semicarbazide hydrochloride (40 mg, 0.36 mmol). Triethyl amine was added dropwise to adjust the pH to 5-6. The reaction mixture was stirred at room temperature overnight. The precipitate was collected by filtration and dried over vacuum pump to afford 38 mg (yield: 54%) title compound as a white solid. 1H-NMR (400 MHz, DMSO-d6) δ ppm 9.62 (s, 1H), 8.84 (d, 1H), 8.26 (d, 1H), 8.15 (d, 1H), 7.96 (d, 1H), 7.77 (m, 3H), 7.44 (q, 1H), 6.69 (b, 2H), 5.03 (t, 1H), 2.07 (s, 3H), 1.83 (d, 3H). LCMS (method A): [MH]+=392, tR=4.88 min.

Workup

  1. filtrationThe precipitate was collected by filtration
  2. customdried over vacuum pump

Sources & evidence

ORD record
ord-f1c9cce7266d4b33a738d496dab8df7f
Source dataset
uspto-grants-2013_07
Patent number
US08497368B2

Reaction notes

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