Oxidatively generated electrophiles as initiators of epoxide cascade cyclization processes
作者:V. Satish Kumar、Shuangyi Wan、Danielle L. Aubele、Paul E. Floreancig
DOI:10.1016/j.tetasy.2005.08.055
日期:2005.10
Oxidatively generated oxocarbenium ions are shown to be effective promoters of polyepoxide cascade cyclization reactions to form polyether compounds. The reaction conditions are neutral, ensuring that background acid-mediated processes are not operative and that other acid-sensitive functional groups, such as acetals, can be incorporated into cyclization substrates. While 5-exo pathways are more common that 6-endo pathways, a rational design has been employed to access tetrahydropyranyl ethers. (c) 2005 Elsevier Ltd. All rights reserved.