Enantioselective Conjugate Addition of <i>N</i>,<i>N</i>-Dialkylhydrazones to α-Hydroxy Enones
作者:David Monge、Eloísa Martín-Zamora、Juan Vázquez、Manuel Alcarazo、Eleuterio Álvarez、Rosario Fernández、José M. Lassaletta
DOI:10.1021/ol071055+
日期:2007.7.1
The activation of alpha-hydroxy enones by the Zn(OTf)2/tBuBOX catalyst enables the enantioselectiveconjugateaddition of 1-methyleneaminopyrrolidine as a neutral d1 synthon. Experimental evidence supports a stereochemical model where a triflate ligand controls the geometry of the catalyst-substrate complex by means of a OH-OTf hydrogen bond. The synthesis of beta-cyano acids illustrates the potential