Triethylamine → [5-(2-Benzyloxy-ethyl)-cyclohex-1-enylmethoxy]-tert-butyl-dimethyl-silane

HRID 970723Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 970723
[CH2:1]([O:8][CH2:9][CH2:10][CH:11]1[CH2:16][C:15]([CH2:17][OH:18])=[CH:14][CH2:13][CH2:12]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)CC)C.[CH3:26][C:27]([Si:30](Cl)([CH3:32])[CH3:31])([CH3:29])[CH3:28]>CN(C=O)C>[CH2:1]([O:8][CH2:9][CH2:10][CH:11]1[CH2:16][C:15]([CH2:17][O:18][Si:30]([C:27]([CH3:29])([CH3:28])[CH3:26])([CH3:32])[CH3:31])=[CH:14][CH2:13][CH2:12]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 28928tert-Butyldimethylsilyl chlorideHCID 21879600{5-[2-(Benzyloxy)ethyl]cyclohex-1-en-1-yl}methanol

Produkt 1

HCID 21879598[5-(2-Benzyloxy-ethyl)-cyclohex-1-enylmethoxy]-tert-butyl-dimethyl-silaneAusbeute 63 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Intermediate R3 was dissolved in THF (100 mL) and added to a solution of DIBAL (70 mL, 1M in hexanes) in THF (160 mL) at −35° C. for 35 minutes. The mixture was quenched with Rochelle's salt solution, and extracted with ether. The dried residue was purified by chromatography on SiO2 with 30% EtOAc:Hx to yield [5-(2-benzyloxy-ethyl)-cyclohex-1-enyl]-methanol 4.6 g (80%). A solution of the alcohol (4.0 g, 18.7 mmol) in DMF (60 mL) was treated with triethylamine (3 mL) followed by TBSCl (3.0 g, 22.4 mol) for 20 minutes at room temperature. The residue was isolated from an aqueous work-up and purified by chromatography to give [5-(2-benzyloxy-ethyl)-cyclohex-1-enylmethoxy]-tert-butyl-dimethyl-silane (Intermediate R4) 3.6 g (63%).

Aufarbeitung

  1. customThe residue was isolated from an aqueous work-up
  2. custompurified by chromatography

Quellen und Nachweise

ORD-Eintrag
ord-d14232fb7dba457fac987a8b7ccc060d
Quelldatensatz
uspto-grants-2007_12
Patentnummer
US07312238B2

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