Water → (2SR,4RS)-4-cyano-2-methyl-4-(3-triisopropylsilylthiophenyl)-3,4,5,6-tetrahydro-2H-pyran

HRID 1418493

Reaktionsgleichung

Reaktionsgleichung von HRID 1418493
[CH:1]([Si:4]([CH:9]([CH3:11])[CH3:10])([CH:6]([CH3:8])[CH3:7])[SH:5])([CH3:3])[CH3:2].[H-].[Na+].[C:14]([C:16]1([C:23]2[CH:28]=[CH:27][CH:26]=[C:25](I)[CH:24]=2)[CH2:21][CH2:20][O:19][CH:18]([CH3:22])[CH2:17]1)#[N:15].O>C1(C)C=CC=CC=1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:14]([C:16]1([C:23]2[CH:28]=[CH:27][CH:26]=[C:25]([S:5][Si:4]([CH:1]([CH3:3])[CH3:2])([CH:6]([CH3:8])[CH3:7])[CH:9]([CH3:11])[CH3:10])[CH:24]=2)[CH2:21][CH2:20][O:19][CH:18]([CH3:22])[CH2:17]1)#[N:15]

Komponenten

7

Edukt 4

HCID 962WaterHCID 24758Sodium hydrideHCID 3435097Tris(propan-2-yl)silanethiolHCID 18786332(2SR, 4RS)-4-cyano-4-(3-iodophenyl)-2-methyl-3,4,5,6-tetrahydro-2H-pyran

Produkt 1

HCID 18786333(2SR,4RS)-4-cyano-2-methyl-4-(3-triisopropylsilylthiophenyl)-3,4,5,6-tetrahydro-2H-pyranAusbeute 96,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 1140TolueneLösungsmittel2×

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a stirred solution of triisopropylsilanethiol (Tetrahedron Lett. 1994, 35, 3221.; 684 mg, 3.6 mmol) in toluene (5 ml) was added sodium hydride (60% oil dispersion, 144 mg, 3.6 mmol) under a nitrogen atmosphere. After stirring for 15 min, the resulting solution was added to a mixture of (2SR, 4RS)-4-cyano-4-(3-iodophenyl)-2-methyl-3,4,5,6-tetrahydro-2H-pyran (1.07 g, 3.27 mmol) and tetrakis(triphenylphosphine)palladium(0) (114 mg, 0.1 mmol) in toluene (20 ml), and the mixture was heated at 80° C. for 1 h. The resulting mixture was cooled, poured into water (50 ml) and extracted with Et2O (100 ml). The organic extract was washed with water (50 ml), brine (50 ml), dried (MgSO4) and concentrated. Purification by silica gel column chromatography, eluting with ethyl acetate-hexane (1:9), gave 1.23 g (96%) of the titled compound as a red oil.

Aufarbeitung

  1. temperatureThe resulting mixture was cooled
  2. extractionextracted with Et2O (100 ml)
  3. extractionThe organic extract
  4. washwas washed with water (50 ml), brine (50 ml)
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated
  7. customPurification by silica gel column chromatography
  8. washeluting with ethyl acetate-hexane (1:9)

Quellen und Nachweise

ORD-Eintrag
ord-0a1033fcc8564c79bf977bfb16299846
Quelldatensatz
uspto-grants-1999_03
Patentnummer
US05883106

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