A Lewis Acid-Catalyzed Formal [3 + 3] Cycloaddition of α,β-Unsaturated Aldehydes with 4-Hydroxy-2-Pyrone, Diketones, and Vinylogous Esters
摘要:
A Lewis acid-catalyzed formal cycloaddition of alpha,beta-unsaturated aldehydes with 6-methyl-4-hydroxy-2-pyrone, 1,3-diketones, and vinylogous silyl esters is described here.
A Lewis Acid-Catalyzed Formal [3 + 3] Cycloaddition of α,β-Unsaturated Aldehydes with 4-Hydroxy-2-Pyrone, Diketones, and Vinylogous Esters
作者:Aleksey V. Kurdyumov、Nan Lin、Richard P. Hsung、Glen C. Gullickson、Kevin P. Cole、Nadiya Sydorenko、Jacob J. Swidorski
DOI:10.1021/ol0523042
日期:2006.1.1
A Lewis acid-catalyzed formal cycloaddition of alpha,beta-unsaturated aldehydes with 6-methyl-4-hydroxy-2-pyrone, 1,3-diketones, and vinylogous silyl esters is described here.
Pd(OH)<sub>2</sub>/C-Mediated Selective Oxidation of Silyl Enol Ethers by <i>tert</i>-Butylhydroperoxide, a Useful Method for the Conversion of Ketones to α,β-Enones or β-Silyloxy-α,β-enones
作者:Jin-Quan Yu、Hai-Chen Wu、E. J. Corey
DOI:10.1021/ol050284y
日期:2005.3.1
[reaction: see text] Pd(OH)2-catalyzed oxidation of silyl enol ethers by t-BuOOH gives either beta-silyloxy-alpha,beta-enones or alpha,beta-enones in good yields depending on the base used.