Bis(2-oxo-3-oxazolidinyl)phosphinic chloride → {3-chloro-2-hydroxy-5-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-[4-(2-diethylamino-ethyl)-piperazin-1-yl]-methanone

HRID 1865627Notes

Reaction equation

HRID 1865627 reaction equation
[Cl:1][C:2]1[C:3]([OH:28])=[C:4]([CH:8]=[C:9]([C:11]2[CH:12]=[C:13]3[C:19]([C:20]4[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=4[O:26][CH3:27])=[N:18][NH:17][C:14]3=[N:15][CH:16]=2)[CH:10]=1)[C:5]([OH:7])=O.[CH2:29]([N:31]([CH2:40][CH3:41])[CH2:32][CH2:33][N:34]1[CH2:39][CH2:38][NH:37][CH2:36][CH2:35]1)[CH3:30].O=C1N(P(Cl)(N2CCOC2=O)=O)CCO1.C(=O)(O)[O-].[Na+]>C(#N)C.CN(C=O)C.O.C(OCC)(=O)C>[Cl:1][C:2]1[C:3]([OH:28])=[C:4]([C:5]([N:37]2[CH2:38][CH2:39][N:34]([CH2:33][CH2:32][N:31]([CH2:40][CH3:41])[CH2:29][CH3:30])[CH2:35][CH2:36]2)=[O:7])[CH:8]=[C:9]([C:11]2[CH:12]=[C:13]3[C:19]([C:20]4[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=4[O:26][CH3:27])=[N:18][NH:17][C:14]3=[N:15][CH:16]=2)[CH:10]=1

Participants

9

Reactant 4

HCID 152842Bis(2-oxo-3-oxazolidinyl)phosphinic chloride2×HCID 516892Sodium BicarbonateHCID 2736105N,N-Diethyl-2-(piperazin-1-yl)ethan-1-amineHCID 1784893953-chloro-2-hydroxy-5-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-benzoic acid

Product 1

HCID 178464031{3-chloro-2-hydroxy-5-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-[4-(2-diethylamino-ethyl)-piperazin-1-yl]-methanoneYield 17%

Reagents, catalysts & solvents 4

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
75 °C

Procedure

14 mg (35 mol) of 3-chloro-2-hydroxy-5-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-benzoic acid and 22 μL (approx. 120 μmol; density unknown) of 1-(2-diethylaminoethyl)-piperazine were dissolved in a mixture of 1 mL of acetonitrile and 100 μL of DMF. 14 mg (55 μmol) of bis(2-oxo-3-oxazolidinyl)phosphinic chloride was added and the mixture heated gently until all materials were dissolved. The resulting solution was left at ambient temperature for 4.5 h. 28 mg (110 μmol) of bis(2-oxo-3-oxazolidinyl)phosphinic chloride was added and the resulting mixture left at ambient temperature for 3.5 h, then heated to 75° C. for 3.5 h. The resulting mixture was distributed between 1 mL of a saturated aqueous solution of sodium bicarbonate in water and 2 mL of ethyl acetate. The organic phase was evaporated and the residue directly purified by mass-triggered reverse-phase HPLC to afford 3.2 mg (5.7 μmol, 17%) of {3-chloro-2-hydroxy-5-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-[4-(2-diethylamino-ethyl)-piperazin-1-yl]-methanone as an off-white solid. 1H NMR (500 MHz, DMSO-d6) δ 13.80 (s, br. 1H), 8.81 (d, 1H), 8.29 (d, 1H), 7.82 (d, 1H), 7.64 (dd, 1H), 7.49-7.44 (m, 2H), 7.21 (d, 1H), 7.10 (ddd, 1H), 3.83 (s, 3H), 3.40-3.30 (m, 4H), 2.49-2.35 (m, 8H), 0.94 (t, 6H), MS: m/z 563.2 (M+H+).

Workup

  1. temperaturethe mixture heated gently until all materials
  2. dissolutionwere dissolved
  3. waitthe resulting mixture left at ambient temperature for 3.5 h
  4. customThe organic phase was evaporated
  5. customthe residue directly purified by mass-triggered reverse-phase HPLC

Sources & evidence

ORD record
ord-d85e36c0aaf64f72a99fdf84dd29896a
Source dataset
uspto-grants-2009_12
Patent number
US07626021B2

Reaction notes

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