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Synthesis of silica-supported rhodium carbene complex as efficient catalyst for the addition of phenylboronic acid to aldehydes

✍ Scribed by Ismail Özdemir; Nevin Gürbüz; Turgay Seçkin; Bekir Çetinkaya

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
146 KB
Volume
19
Category
Article
ISSN
0268-2605

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✦ Synopsis

Silica

-supported catalytically active functional materials, such as the rhodium(I) carbene complex with 1-(triethoxysilylpropyl)-3-(2,4,6-trimethylbenzyl)imidazolidine-2-ylidine (L), were prepared using the sol-gel method. The complex (1; COD = 1,5-cyclooctadiene) RhCl(COD)[1-(triethoxysilylpropyl)-3-(2,4,6-trimethylbenzyl)imidazolidin-2-ylidine] was characterized by conventional spectroscopic methods and elemental analyses and the silica-supported functional material RhCl(COD)(L) were tested for the catalytic addition of phenylboronic acid to aldehydes.

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## Abstract HClO~4~SiO~2~ (0.6 mol%) acts as a highly effective catalyst for cyanation of various aldehydes to the corresponding __O__‐trimethylsilyl cyanohydrins, in high yields and short reaction times. Copyright © 2007 John Wiley & Sons, Ltd.