Imidazole → 1-[[(1,1-Dimethylethyl)diphenylsilyl]oxy]-5-hexene-2,3-diol

HRID 54810Notes

Reaction equation

HRID 54810 reaction equation
[CH2:1]([OH:9])[CH:2]([OH:8])[CH:3]([OH:7])[CH2:4][CH:5]=[CH2:6].N1C=CN=C1.[Si:15](Cl)([C:28]([CH3:31])([CH3:30])[CH3:29])([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1>C(Cl)Cl.CN(C)C=O.C(OCC)C>[CH3:31][C:28]([Si:15]([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)([C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1)[O:9][CH2:1][CH:2]([OH:8])[CH:3]([OH:7])[CH2:4][CH:5]=[CH2:6])([CH3:29])[CH3:30]

Participants

6

Reactant 3

HCID 795ImidazoleHCID 94078tert-ButyldiphenylchlorosilaneHCID 112979875-Hexene-1,2,3-triol

Product 1

HCID 220709881-[[(1,1-Dimethylethyl)diphenylsilyl]oxy]-5-hexene-2,3-diolYield 73%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 22350042dichloromethane N,N-dimethylformamideSolvent

Procedure

A 0° C. solution of 7.33 g of product from Example 273 in 120 ml of 5:1 dry methylene chloride/N,N-dimethylformamide is treated with 5.29 g of imidazole and 16.77 g of t-butyl diphenylsilyl chloride. The reaction mixture is warmed to room temperature and stirred vigorously for 16 hours, diluted with diethyl ether and filtered. The filtrate is concentrated and purified by chromatography (Silica Gel: 0-50% ethyl acetate/hexane) to give 15 g of the desired product.

Workup

  1. filtrationfiltered
  2. concentrationThe filtrate is concentrated
  3. custompurified by chromatography (Silica Gel: 0-50% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-83eb285bcdd44d219a00e941226cdc5a
Source dataset
uspto-grants-1997_04
Patent number
US05623081

Reaction notes

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