反応 #986

反応方程式

alcohol

[4-(3-[1,3]-Dioxan-2-yl-propyl)phenyl]methanol

imidazole

tert-butylchlorodiphenyl silane

→

171

収率 102.9%

2-[3-(4-tert-Butyldiphenylsilyloxymethylphenyl)propyl]-[1,3]-dioxolane

収率 102.9%

溶媒

CH2Cl2

ethyl acetate

反応条件

後処理

1. 1
   洗浄washed with 0.5N HCl
2. 2
   乾燥The organic layer was dried over MgSO4
3. 3
   ろ過filtered
4. 4
   濃縮concentrated
5. 5
   洗浄Flash chromatography (elution with 5% ethyl acetate in hexane)

実験手順

To a solution of 2.58 g (11.6 mmol) of alcohol 170 and 1.19 g (17.5 mmol) of imidazole in 50 mL of CH2Cl2 was added 3.4 mL (13.1 mmol) of tert-butylchlorodiphenyl silane and the resulting mixture was allowed to stir at room temperature for 1 h. The mixture was then diluted with ethyl acetate and washed with 0.5N HCl. The organic layer was dried over MgSO4, filtered and concentrated. Flash chromatography (elution with 5% ethyl acetate in hexane) afforded 5.5 g of 171. 1H NMR consistent with the product.

出典