Lewis Acid-Catalyzed Preparation of Bridge-head Adamantanoid Nitriles from their Corresponding Halides and Trimethylsilyl Cyanide
作者:George A. Olah、Omar Farooq、G. K. Surya Prakash
DOI:10.1055/s-1985-31453
日期:——
Bridge-head adamantyl and diamantyl nitriles 2 have been prepared in good yields by refluxing the corresponding halides 1 with trimethylsilyl cyanide and tin(IV) chloride in dichloromethane.
The reactivity of bridgehead organo-lithium compounds with three nonenolisable ketones (hexamethylacetone, adamantanone and benzophenone) has been examined in various media. The condensations require use of mixed solvents (pentane-ether or pentane-THF), but secondary products are formed by solvent-attack. The alkylation of the bridgehead structure, by increasing the lipophilicity of the molecule, makes