N-silyl oxyketene imines are underused yet highly versatile reagents for catalytic asymmetric synthesis
作者:Scott E. Denmark、Tyler W. Wilson
DOI:10.1038/nchem.857
日期:2010.11
process, arguably the most characteristic reaction of d1 synthetic equivalents, finds no general solution for reactions involving aliphatic acyl anions. In this Article, we introduce a new class of stable, isolable silyl ketene imines derivedfrom protected cyanohydrins. These nucleophiles serve as acyl anion equivalents in Lewis base catalysed aldol addition reactions and allow for the preparation of cross-benzoin