Diisopropylethylamine → 2-[6-(3,3-Difluoroazetidin-1-yl)pyrimidin-4-yl]-4-(1H-imidazol-1-yl)-1,2-dihydro-3H-pyrazol-3-one

HRID 562477Notes

Reaction equation

HRID 562477 reaction equation
Cl.Cl[C:3]1[N:8]=[CH:7][N:6]=[C:5]([N:9]2[C:13](=[O:14])[C:12]([N:15]3[CH:19]=[CH:18][N:17]=[CH:16]3)=[CH:11][NH:10]2)[CH:4]=1.Cl.[F:21][C:22]1([F:26])[CH2:25][NH:24][CH2:23]1.C(N(C(C)C)C(C)C)C>O1CCCC1>[F:21][C:22]1([F:26])[CH2:25][N:24]([C:3]2[N:8]=[CH:7][N:6]=[C:5]([N:9]3[C:13](=[O:14])[C:12]([N:15]4[CH:19]=[CH:18][N:17]=[CH:16]4)=[CH:11][NH:10]3)[CH:4]=2)[CH2:23]1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 27582473,3-Difluoroazetidine hydrochlorideHCID 866352552-(6-Chloropyrimidin-4-yl)-4-(1H-imidazol-1-yl)-1,2-dihydro-3H-pyrazol-3-one hydrochloride

Product 1

HCID 444651272-[6-(3,3-Difluoroazetidin-1-yl)pyrimidin-4-yl]-4-(1H-imidazol-1-yl)-1,2-dihydro-3H-pyrazol-3-one

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

100 mg (0.3 mmol) of the compound from Example 13A, 52 mg (0.4 mmol) of 3,3-difluoroazetidine hydrochloride and 175 μl (130 mg, 1.0 mmol) of N-ethyl-N-(propan-2-yl)propane-2-amine are initially charged in 2 ml of tetrahydrofuran and reacted in a single mode microwave (Emrys Optimizer) at 120° C. for 3 h. The precipitated solid is filtered off and the filtrate is concentrated under reduced pressure. The residue is taken up in acetonitrile/water and purified by preparative HPLC (RP18 column; mobile phase: acetonitrile/water gradient). Yield: 36 mg (32% of theory)

Workup

  1. customreacted in a single mode microwave (Emrys Optimizer) at 120° C. for 3 h
  2. filtrationThe precipitated solid is filtered off
  3. concentrationthe filtrate is concentrated under reduced pressure
  4. custompurified by preparative HPLC (RP18 column; mobile phase: acetonitrile/water gradient)

Sources & evidence

ORD record
ord-dc2a75ed8cb14021815e7154a722e23b
Source dataset
uspto-grants-2011_11
Patent number
US08067407B2

Reaction notes

Loading…