Diethyl Ether → Stannane, trimethyl(4-methylphenyl)-

HRID 1080722

반응식

HRID 1080722 반응식
[C:1]1([CH3:9])[CH:6]=[CH:5][C:4]([Mg]Br)=[CH:3][CH:2]=1.C(OCC)C.[CH3:15][Sn:16](Cl)([CH3:18])[CH3:17].[Cl-].[NH4+].CC1C=CC(C2C=CC(C)=CC=2)=CC=1>O1CCCC1.O>[CH3:9][C:1]1[CH:6]=[CH:5][C:4]([Sn:16]([CH3:18])([CH3:17])[CH3:15])=[CH:3][CH:2]=1

참가 물질

8

반응물 5

HCID 3283Diethyl EtherHCID 11941Di-p-tolylHCID 14016Trimethyltin chlorideHCID 25517Ammonium ChlorideHCID 178418370HCID 178418370, 화합물

생성물 1

HCID 617834Stannane, trimethyl(4-methylphenyl)-수율 100%

시약·촉매·용매 2

HCID 962Water용매HCID 8028Tetrahydrofuran용매

실험 절차

41.4 L of 1.0M p-tolylmagnesium bromide in diethyl ether (41.4 mol) was added dropwise, maintaining the temperature below -5° C., over 4 hours to a solution of 546 g (2.79 mol) of trimethyltin chloride in tetrahydrofuran (4 L) under nitrogen at -10° C. The suspension was allowed to warm slowly to room temperature over 12 h then saturated ammonium chloride solution (1 L) was added followed by sufficient water (approximately 1 L) to dissolve the precipitate. The solution was extracted with ether-hexane (1:1) (1×4 L, 3×2 L). The combined organic phases were washed with brine, dried over magnesium sulfate and the solvents removed under vacuum. Purification by flash chromatography on silica gel, eluting with hexane/ethyl acetate (95:5), gave a pale yellow oil containing white crystals of 4,4'-dimethylbiphenyl which were removed by filtration to leave 711.3 g (100%) of product. 1H NMR (300 MHz, CDCl3): 0.30 (s 9H), 2.34 (s, 3H), 7.19 (d, 7.7 Hz, 2H), 7.40 (d, 7.7 Hz, 2H).

후처리

  1. temperaturemaintaining the temperature below -5° C.
  2. dissolutionto dissolve the precipitate
  3. extractionThe solution was extracted with ether-hexane (1:1) (1×4 L, 3×2 L)
  4. washThe combined organic phases were washed with brine
  5. dry with materialdried over magnesium sulfate
  6. customthe solvents removed under vacuum
  7. customPurification by flash chromatography on silica gel
  8. washeluting with hexane/ethyl acetate (95:5)
  9. customgave a pale yellow oil
  10. customwere removed by filtration

출처 및 근거

ORD 기록
ord-74a262af77854c29a7b53518fb9b4d76
출처 데이터셋
uspto-grants-1996_12
특허 번호
US05583130

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