Methanesulfonic Acid → 4-Methylthio-N-(2-mercaptoethyl)pyridinium methanesulfonate

HRID 1583516

반응식

HRID 1583516 반응식
[CH3:1][S:2][C:3]1[CH:8]=[CH:7][N:6]=[CH:5][CH:4]=1.[CH3:9][S:10]([OH:13])(=[O:12])=[O:11].[CH2:14]1[S:16][CH2:15]1>O>[CH3:9][S:10]([O-:13])(=[O:12])=[O:11].[CH3:1][S:2][C:3]1[CH:8]=[CH:7][N+:6]([CH2:14][CH2:15][SH:16])=[CH:5][CH:4]=1

참가 물질

5

반응물 3

HCID 6395Methanesulfonic AcidHCID 9865ThiiraneHCID 1409384-(Methylthio)pyridine

생성물 1

HCID 138846254-Methylthio-N-(2-mercaptoethyl)pyridinium methanesulfonate

시약·촉매·용매 1

HCID 962Water용매

실험 절차

4-Methylthiopyridine (2.75 g, 22.0 mmol) was added slowly to methanesulfonic acid* (0.65 mL, 10.5 mmol) by cooling in an ice-bath. To this solid was added ethylene sulfide* (0.66 mL, 11.0 mmol, Aldrich) and the mixture was heated at 50°-60° C. for 21 h. As reaction proceeds the solid went to solution. After cooling, the reaction mixture was dissolved in H2O (5 mL) and washed with Et2O (5×4 mL). The cloudy aqueous layer was filtered over Celite and the filtrate was purified by reverse phase silica gel column chromatography (C18 micro bondapack 10 g) eluting with H2O. Each fraction of 10 mL was collected. Fractions 2 and 3 were combined and repurified by the reverse phase column. Fraction 2 gave 1.258 g (4.48 mmol, y. 42.6%) of the title compound as a viscous oil: 1Hmr (DMSO-d6, CFT-20) δ: 2.32 (3H, s, MeSO3⃝), 2.72 (3H, s, --SMe), 2.68 (1H, m, SH), 2.9-3.2 (3H, m, --CH2S--), 4.59 (2H, t, J=6.4 Hz, --CH2N⊕), 7.97 (2H, "d", J=7.2 Hz, aromatic-Hs) and 8.72 ppm (2H, "d", J=7.2 Hz, aromatic-Hs); ir (neat) νmax : 1630, 1200 (br, --SO3⃝), 785 and 770 cm-1.

후처리

  1. temperatureby cooling in an ice-bath
  2. temperaturethe mixture was heated at 50°-60° C. for 21 h
  3. customAs reaction
  4. temperatureAfter cooling
  5. washwashed with Et2O (5×4 mL)
  6. filtrationThe cloudy aqueous layer was filtered over Celite
  7. customthe filtrate was purified by reverse phase silica gel column chromatography (C18 micro bondapack 10 g)
  8. washeluting with H2O
  9. customEach fraction of 10 mL was collected
  10. customrepurified by the reverse phase column

출처 및 근거

ORD 기록
ord-48d9c4c9576249e5bf940598736e3d32
출처 데이터셋
uspto-grants-1985_11
특허 번호
US04552696

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