Reactions of Alkyl Azides and Ketones as Mediated by Lewis Acids: Schmidt and Mannich Reactions Using Azide Precursors
作者:Pankaj Desai、Klaas Schildknegt、Konstantinos A. Agrios、Craig Mossman、Gregory L. Milligan、Jeffrey Aubé
DOI:10.1021/ja000490v
日期:2000.8.1
variation of the Mannichreaction. The scope of each of these reactions, the dependence of the observed products upon azide and ketone structure, and the nature of acid promotion are discussed. In broad strokes, cyclohexanones and other cyclic ketones react in the presence of TiCl4 to afford insertion products, whereas the Mannich route predominates when benzyl azide and triflic acid are used. The features
Mannich reactions using benzyl azide as a latent N-(phenylamino)methylating agent
作者:Klaas Schildknegt、Konstantinos A. Agrios、Jeffrey Aubé
DOI:10.1016/s0040-4039(98)01721-3
日期:1998.10
tetrachloride effects 1,2-phenyl migration with concomitant liberation of molecular nitrogen. The resulting N-phenyl iminium ion intermediate readily combines with enolizable carbonyl substrates to form Mannich bases.
(Trichloromethyl)benzene: A Versatile Reagent for the Preparation of Substituted Benzophenones
作者:N. R. Ayyangar、R. J. Lahoti、K. V. Srinivasan、Thomas Daniel
DOI:10.1055/s-1991-26457
日期:——
Aromatic and heteroaromatic compounds were benzoylated efficiently with (trichloromethyl)benzene in 1,2-dichloroethane in the presence of aluminum chloride in good yield.