Zirconocene-Catalyzed Alkylation of Aryl Alkenes with Alkyl Tosylates, Sulfates, and Bromides. -Primary and secondary alkyl groups can be introduced regioselectively at the benzylic position of styrenes by alkylation in the presence of catalytic amounts of zirconocene catalysts.
Zirconocene-catalyzed alkylation of aryl alkenes with alkyl tosylates, sulfates and bromides
โ Scribed by Jun Terao; Tsunenori Watanabe; Koyu Saito; Nobuaki Kambe; Noboru Sonoda
- Book ID
- 104260262
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 232 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
โฆ Synopsis
Styrenes were alkylated with alkyl tosylates, sulfates and bromides in the presence of a zirconocene catalyst and "BuMgC1 in THF. By the use of this reaction, primary and secondary alkyl groups can be introduced regioselectively at the benzylic carbon of styrenes to give a-substituted ethylbenzenes.
๐ SIMILAR VOLUMES
Treatment of secondary or tertiary alkyl bromides with alkyl Grignard reagents in the presence of catalytic amounts of silver bromide and potassium fluoride in CH 2 Cl 2 afforded the corresponding cross-coupling products in reasonable yields. Moreover, silver showed catalytic activity for the cross-