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.
Reduction of α-trialkylsiloxy nitriles with diisobutylaluminium hydride (DIBAH): A facile preparation of α-trialkylsiloxy aldehydes and their derivatives
could be achieved via the reduction of α-trimethylsiloxy nitriles with diisobutylaluminium hydride (DIBAH) starting from a variety of ketones. The facile synthesis of optically active α-tert-butyldimethylsiloxy aldehydes was attained by combination of asymmetric silylcyanation of aldehydes and DIBAH reduction of optically active α-siloxy nitriles. Furthermore, in the reduction of some α-tert-butyldimethylsiloxy-β