Hydrochloric Acid → HCID 58168469, compound
Reaction equation
[C:1]([Si:5]([O:8][CH2:9][CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[O:17][CH3:18])([CH3:7])[CH3:6])([CH3:4])([CH3:3])[CH3:2].C([Li])CCC.CN(CCN(C)C)C.Cl.C1C[O:36][CH2:35]C1>CN(C=O)C>[Si:5]([O:8][CH2:9][CH2:10][C:11]1[C:12]([O:17][CH3:18])=[C:13]([CH:14]=[CH:15][CH:16]=1)[CH:35]=[O:36])([C:1]([CH3:3])([CH3:4])[CH3:2])([CH3:6])[CH3:7]Participants
Procedure
tert-Butyl(2-methoxyphenethoxy)dimethylsilane [Aromatic Intermediate 26, step a] (2.0 g), as a solution in THF (1 mL), was added dropwise over 5 min to a stirred solution of butyllithium (2.5M in hexanes, 4.5 mL) and TMEDA (1.7 mL) in tetrahydrofuran (20 mL) at 0° C. The resulting mixture was stirred for 4 hours, and then DMF (2.9 mL) was added. The mixture was stirred for a further 30 min and allowed to warm to RT. The reaction was poured into aqueous HCl (0.5M, 20 mL) and extracted with ether (2×50 mL). The combined organic solutions were washed with water (50 mL) and brine (50 mL), dried over magnesium sulphate, filtered and evaporated. The resulting gum was purified by silica gel chromatography eluting with isohexane to 4:1 isohexane:ethyl acetate gradient to give the titled compound as a clear oil. Yield 0.40 g.
Workup
- stirringThe mixture was stirred for a further 30 min
- extractionextracted with ether (2×50 mL)
- washThe combined organic solutions were washed with water (50 mL) and brine (50 mL)
- dry with materialdried over magnesium sulphate
- filtrationfiltered
- customevaporated
- customThe resulting gum was purified by silica gel chromatography
- washeluting with isohexane to 4:1 isohexane
Sources & evidence
- ORD record
- ord-7bbdfbb91bab4d07a271a9ad954e6a15
- Source dataset
- uspto-grants-2013_06
- Patent number
- US08455483B2
Reaction notes
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