Synthesis of Iminonitriles by Oxone/TBAB-Mediated One-Pot Oxidative Three-Component Strecker Reaction
摘要:
Oxidative three-component reaction of aldehydes, amines, and TMSCN in a biphasic solvent system (toluene/H2O) containing Oxone, tetra-n-butylammonium bromide (TBAB) and sodium bicarbonate afforded alpha-iminonitriles in good to excellent yields. This oxidative Strecker reaction was applicable to a wide range of aldehydes and amines, aromatic or aliphatic, of different electronic and steric properties. Substituted 1-aza-2-cyano-1,3-dienes were also accessible using alpha,beta-unsaturated aldehydes as inputs.
Nickel-Catalyzed Cross-Coupling of Alkyl Zinc Halides for the Formation of C(sp<sup>2</sup>)C(sp<sup>3</sup>) Bonds: Scope and Mechanism
作者:Vilasâ B. Phapale、Manuel Guisán-Ceinos、Elena Buñuel、Diegoâ J. Cárdenas
DOI:10.1002/chem.200901913
日期:2009.11.23
Optimal conditions for a general Ni‐catalysed Negishi cross‐coupling of alkyl zinc halides with aryl, heteroaryl and alkenyl halides have been determined. These conditions allow the reaction to take place smoothly, with low catalyst loading, and in the presence of a wide variety of functional groups to afford products in good yields at room temperature. DFT studies on the mechanism support the occurrence