Potassium Metal Dispersed on Silica: A Versatile Reagent in Organic Chemistry

✍ Scribed by Jaacov Levy; Dov Tamarkin; Henry Selig; Prof. Dr. Mordecai Rabinovitz

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 142 KB
• Volume: 20
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.198110331

✦ Synopsis

The title reagent K/SiO~2~ has a greater reactivity and a different selectivity compared to metallic potassium. It is particularly suitable for dimerizations: benzophenone can be converted with K/SiO~2~ into benzopinacol in 72% yield; bromo‐ and iodobenzene afford biphenyl in yields of more than 80%.