Carbocation-Forming Reactions in Dimethyl Sulfoxide
作者:Xavier Creary、Elizabeth A. Burtch、Ziqi Jiang
DOI:10.1021/jo026468x
日期:2003.2.1
the endo-trifluoroacetate leavinggroup as well as an exo-hydrogen. The O-methyl oxime derivative of alpha-chloro-alpha,alpha-diphenylacetophenone reacts in DMSO-d(6) to give 1-methoxy-2,3-diphenylindole, a product derived from cyclization of a cationic intermediate. A common ion rate suppression provides further evidence for a cationic mechanism. The triflate derivative of pivaloin reacts by a cationic
A Convenient One-Pot Cyanosilylation of Aldehydes and Ketones Using Potassium or Sodium Cyanide Impregnated on Amberlite XAD Resin and Trimethylsilyl Chloride
作者:Kazuaki Sukata
DOI:10.1246/bcsj.60.3820
日期:1987.10
In the cyanosilylation of benzaldehyde, the combination of potassium or sodium cyanide impregnated on Amberlite XAD resin and trimethylsilyl chloride has been found to be a good one-pot cyanosilylation agent. Although acetonitrile is the best solvent, substantial yields of the product is obtained even in a nonpolar solvent or without any solvent. In the reaction with other aldehydes or ketones, this
Cyclic cyano derivatives 3 were obtained by the reaction of Me3SiCN/ZnI2 with the cyclic ketones 2 which gave the trimethylsilyloxy nitriles 4. They were directly transformed to cyano derivatives 3 (70-80% yield) by the reductive reagent Me3SiCl-NaI in acetonitrile in the presence of H2O.
CONVERSION OF KETONES TO CYANOHYDRINS: BENZOPHENONE CYANOHYDRIN