Addition of Free Me2Ge: to Alkenes and Alkynes on Glass Surfaces in the Presence of Water
Traces of water on glass surfaces (even after heating) can decisively influence the course of a reaction. This is shown by the reactions of Me2Ge: with alkenes such as acrylonitrile and alkynes such as phenylacetylene in “anhydrous” medium. These reactions afforded poor yields of 1 and 2, respective...
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| Veröffentlicht in: | Angewandte Chemie International Edition 1989-08, Vol.28 (8), p.1028-1029 |
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| container_title | Angewandte Chemie International Edition |
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| creator | Neumann, Wilhelm P. Sakurai, Hideki Billeb, Gilbert Brauer, Hartmut Köcher, Jürgen Viebahn, Sabine |
| description | Traces of water on glass surfaces (even after heating) can decisively influence the course of a reaction. This is shown by the reactions of Me2Ge: with alkenes such as acrylonitrile and alkynes such as phenylacetylene in “anhydrous” medium. These reactions afforded poor yields of 1 and 2, respectively. On the other hand, reaction in the presence of water and silica gel gave 1 and 2 in nearly quantitative yield; the presence of water alone did not increase the yield. These findings indicate that acidic H atoms, formed on the silica surface, are essential for the reaction of the expected products with water. |
| doi_str_mv | 10.1002/anie.198910281 |
| format | Article |
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This is shown by the reactions of Me2Ge: with alkenes such as acrylonitrile and alkynes such as phenylacetylene in “anhydrous” medium. These reactions afforded poor yields of 1 and 2, respectively. On the other hand, reaction in the presence of water and silica gel gave 1 and 2 in nearly quantitative yield; the presence of water alone did not increase the yield. 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| title | Addition of Free Me2Ge: to Alkenes and Alkynes on Glass Surfaces in the Presence of Water |
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