Reaktion #471770

Reaktionsgleichung

3-Aminopropyltrimethoxysilane

methyl acrylate

→

methyl 3-[(2-methoxycarbonylethyl)-(3-trimethoxysilylpropyl)amino]propionate

Ausbeute 99.1%

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   EinengenThe reaction mixture is concentrated at reduced pressure

Vorschrift

3-Aminopropyltrimethoxysilane (11.05 g, 61.7 mmol) and methanol (20 ml) are stirred together for 30 minutes at room temperature. To the mixture is added 41.46 g (482 mmol) of methyl acrylate. The reaction mixture is heated overnight in a 30° C. oil bath. The reaction mixture is concentrated at reduced pressure to give 21.50 g of crude methyl 3-[(2-methoxycarbonylethyl)-(3-trimethoxysilylpropyl)amino]propionate, a yellow viscous oil. A mixture of the crude product, 1-[4-(2-hydroxyethyoxy)phenyl]-2-hydroxy-2-methylpropan-1-one (26.85 g, 119.7 mmol) and 1,2-dimethoxyethane (80 ml) is heated in an oil bath at 85° (bath temperature). Zirconium(IV) acetylacetonate (1.16 g, 2.38 mmol) is added, and the mixture is stirred at 85° C. overnight and then at room temperature for 24 hours. Solvent is evaporated, and approximately one-half of the crude product is passed through a silica gel column with 5:1 chloroform:methanol as eluent to obtain 15.74 g of the title compound, a yellow semisolid product.

Quelle