Amide Enolate Additions to Acylsilanes: In Situ Generation of Unusual and Stereoselective Homoenolate Equivalents
作者:Robert B. Lettan、Chris V. Galliford、Chase C. Woodward、Karl A. Scheidt
DOI:10.1021/ja808811u
日期:2009.7.1
The synthesis of beta-hydroxy carbonyl compounds is an important goal due to their prevalence in bioactive molecules. A novel approach to construct these structural motifs involves the multicomponent reaction of acylsilanes, amides, and electrophiles. The addition of amide enolates to acylsilanes generates beta-silyloxy homoenolate reactivity by undergoing a 1,2-Brook rearrangement. These unique nucleophiles
Synthesis of Tertiary β-Hydroxy Amides by Enolate Additions to Acylsilanes
作者:Robert B. Lettan、Troy E. Reynolds、Chris V. Galliford、Karl A. Scheidt
DOI:10.1021/ja065605v
日期:2006.12.1
synthesis of tertiary β-hydroxy amides from acylsilanes, acetamides, and electrophiles is described. The addition of amide enolates to acylsilanes generates β-silyloxy homoenolate reactivity by undergoing a 1,2-Brook rearrangement. These unique nucleophiles formed in situ can then undergo smooth addition to alkyl halides, aldehydes, and ketones. Enolates derived from amides are crucial for the success