Pyridine → 2,5-dichloro-N-(2-methyl-benzooxazol-5-yl)-benzenesulfonamide

HRID 507361노트

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HRID 507361 반응식
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([Cl:8])=[CH:4][C:3]=1[S:9](Cl)(=[O:11])=[O:10].N1C=CC=CC=1.[NH2:19][C:20]1[CH:21]=[CH:22][C:23]2[O:27][C:26]([CH3:28])=[N:25][C:24]=2[CH:29]=1.C([O-])(O)=O.[Na+]>ClCCl>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([Cl:8])=[CH:4][C:3]=1[S:9]([NH:19][C:20]1[CH:21]=[CH:22][C:23]2[O:27][C:26]([CH3:28])=[N:25][C:24]=2[CH:29]=1)(=[O:11])=[O:10]

참가 물질

6

반응물 4

HCID 1049PyridineHCID 794012,5-Dichlorobenzenesulfonyl chlorideHCID 516892Sodium BicarbonateHCID 7379202-Methyl-1,3-benzoxazol-5-amine

생성물 1

HCID 253483472,5-dichloro-N-(2-methyl-benzooxazol-5-yl)-benzenesulfonamide수율 63%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

To a solution of 2,5-dichlorobenzenesulphonyl chloride (52 mg, 0.21 mmol) in dichloromethane (1.5 mL) was added pyridine (40 μL, 0.5 mmol) and the mixture was stirred under N2 for 5 min, after which time 5-amino-2-methylbenzoxazole (30 mg, 0.20 mmol) was added. The resulting mixture was stirred for 1 h at room temperature, then saturated NaHCO3 solution was added (8 mL) and the mixture was extracted into ethyl acetate (15 mL). The organic phase was washed with brine, dried (Na2SO4), filtered and evaporated to give a residue that was purified using flash chromatography to afford a pale pink solid (45 mg, 63%), single spot at Rf 0.53 (1:1 hexane:ethyl acetate). mp 193.5-193.9° C., HPLC purity 98% (tR 2.27 min in 10% water-acetonitrile). 1H NMR (CDCl3): δ 7.86 (1H, d, J=2.2 Hz), 7.39 (4H, m), 7.12 (1H, dd, J=8.4, 1.8 Hz), 2.58 (3H, s). LCMS: 355.07 (M−). FAB-MS (MH+, C14H10Cl2N2O3S): calcd 356.9867, found 356.9878.

후처리

  1. stirringThe resulting mixture was stirred for 1 h at room temperature
  2. extractionthe mixture was extracted into ethyl acetate (15 mL)
  3. washThe organic phase was washed with brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. customevaporated
  7. customto give a residue that
  8. customwas purified

출처 및 근거

ORD 기록
ord-701cfdddfb2c4991b7841819602d7f7b
출처 데이터셋
uspto-grants-2010_08
특허 번호
US07786152B2

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