Cesium carbonate → HCID 86689711, compound

HRID 1396340Notes

Reaction equation

HRID 1396340 reaction equation
Cl[C:2]1[CH:7]=[C:6]([Cl:8])[N:5]=[N:4][C:3]=1[C:9]([O:11][CH3:12])=[O:10].[CH3:13][S:14]([C:17]1[CH:18]=[CH:19][C:20]([NH2:23])=[N:21][CH:22]=1)(=[O:16])=[O:15].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.C(=O)([O-])[O-].[Cs+].[Cs+]>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O1CCOCC1>[Cl:8][C:6]1[N:5]=[N:4][C:3]([C:9]([O:11][CH3:12])=[O:10])=[C:2]([NH:23][C:20]2[CH:19]=[CH:18][C:17]([S:14]([CH3:13])(=[O:16])=[O:15])=[CH:22][N:21]=2)[CH:7]=1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 17848322Methyl 4,6-dichloropyridazine-3-carboxylateHCID 178610085-Methanesulfonylpyridin-2-amine

Product 1

HCID 86689711HCID 86689711, compoundYield 19%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A flask was charged with methyl 4,6-dichloropyridazine-3-carboxylate (200 mg, 0.966 mmol), 5-(methylsulfonyl)pyridin-2-amine (183 mg, 1.06 mmol), Pd2(dba)3 (88.5 mg, 0.097 mmol), xantphos (112 mg, 0.193 mmol) and cesium carbonate (944 mg, 2.9 mmol). 1,4-Dioxane (6.0 mL) was added and argon was bubbled through it while sonicating the flask for 5 min. The flask was sealed and heated at 100° C. for 1 h. After cooling the mixture was filtered through celite and the filter cake washed with CH2Cl2. The filtrates were concentrated in vacuo then purified by chromatography (spherical silica 20-45 μM, 23 g, Versaflash Supelco, 0 to 100% ethyl acetate in hexanes, 30 min) to give methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate (62 mg, 19%) as a light yellow solid. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 11.18 (s, 1H) 9.31 (s, 1H) 8.98 (d, J=2.27 Hz, 1H) 8.19 (dd, J=8.59, 2.53 Hz, 1H) 7.09 (dd, J=8.84, 0.76 Hz, 1H) 4.15 (s, 3H) 3.15 (s, 3H). LCMS (EI/CI) m/z: 342.9 [M+H].

Workup

  1. customargon was bubbled through it
  2. customwhile sonicating the flask for 5 min
  3. customThe flask was sealed
  4. temperatureAfter cooling the mixture
  5. filtrationwas filtered through celite
  6. washthe filter cake washed with CH2Cl2
  7. concentrationThe filtrates were concentrated in vacuo
  8. customthen purified by chromatography (spherical silica 20-45 μM, 23 g, Versaflash Supelco, 0 to 100% ethyl acetate in hexanes, 30 min)

Sources & evidence

ORD record
ord-abc9b81491254b3a9799a53293644aa5
Source dataset
uspto-grants-2014_12
Patent number
US08901124B2

Reaction notes

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