Water → 2-(3-Chlorophenyl)-4-(cyclopentyl)-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinone

HRID 891353Notes

Reaction equation

HRID 891353 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:8]2[C:13](=[O:14])[C:12](OS(C3C=CC(C)=CC=3)(=O)=O)=[C:11]([C:26]3[CH:31]=[CH:30][C:29]([S:32]([CH3:35])(=[O:34])=[O:33])=[CH:28][CH:27]=3)[CH:10]=[N:9]2)[CH:5]=[CH:6][CH:7]=1.[CH:36]1([Mg]Cl)[CH2:40][CH2:39][CH2:38][CH2:37]1.O>C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]([N:8]2[C:13](=[O:14])[C:12]([CH:36]3[CH2:40][CH2:39][CH2:38][CH2:37]3)=[C:11]([C:26]3[CH:27]=[CH:28][C:29]([S:32]([CH3:35])(=[O:33])=[O:34])=[CH:30][CH:31]=3)[CH:10]=[N:9]2)[CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 962WaterHCID 219340222-(3-Chlorophenyl)-4-tosyloxy-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinoneHCID 178478989HCID 178478989, compound

Product 1

HCID 219343512-(3-Chlorophenyl)-4-(cyclopentyl)-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinoneYield 94%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a −78° C. solution of 2-(3-chlorophenyl)-4-tosyloxy-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinone, prepared in Example 333, (0.175 g, 0.33 mmol) in THF (3.3 mL) was added cyclopentyl magnesium chloride (0.17 mL, 1.0 M in diethyl ether). The resulting solution was stirred under nitrogen less than 1 hour with warming to room temperature. The reaction was poured into water and extracted with ethyl acetate. The combined organics were dried over MgSO4 and concentrated in vacuo. The resulting crude product was purified using flash chromatography (SiO2, 2:1 ethyl acetate:hexanes) to provide the desired product (yield: 0.1328 g, 94%). mp 155-157° C. 1H NMR (300 MHz, DMSO d6) δ 1.50 (m, 2H), 1.66 (m, 2H), 1.79 (m, 2H), 2.09 (m, 2H), 2.90 (m, J=8 Hz, 1H), 3.26-3.37 (3H, obstructed by H2O), 7.49-7.63 (m, 3H), 7.71 (m, 3H), 7.97 (s, 1H), 8.10 (m, 2H). MS (DCI/NH3) m/z 429 (M+H)+, 446 (M+NH4)+. Anal. calc. for C22H21ClN2O3S: C, 61.60; H, 4.93; N, 6.53. Found: C, 61.48; H, 4.81; N, 6.22.

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialThe combined organics were dried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customThe resulting crude product was purified

Sources & evidence

ORD record
ord-a461cb55f378481285891f4ef23b3274
Source dataset
uspto-grants-2006_02
Patent number
US07001895B2

Reaction notes

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