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
Iron(III)-Catalyzed Tandem Sequential Methanol Oxidation/Aldol Coupling
作者:Vincent Lecomte、Carsten Bolm
DOI:10.1002/adsc.200505163
日期:2005.10
Iron(III)-catalyzedmethanoloxidations have been performed using hydrogen peroxide as oxidant. Formaldehyde is formed in situ and reacts subsequently with activated ketones to give α-hydroxymethyl carbonyl compounds in good yields. As side reactions iron-catalyzed α-hydroxylations have been observed.