Photochemical [2 + 2] Cycloaddition of Acetylene to Chiral 2(5<i>H</i>)-Furanones
作者:Ramon Alibés、Pedro de March、Marta Figueredo、Josep Font、Xiaolin Fu、Marta Racamonde、Ángel Álvarez-Larena、Juan F. Piniella
DOI:10.1021/jo0264731
日期:2003.2.1
The [2 + 2] photocycloaddition of acetylene to chiral 2(5H)-furanones was investigated. The influence on the chemical yield and facial diastereoselectivity of the substituent at the stereogenic center and also the effect of a 4-methyl group were evaluated. A mechanistic proposal based on a simple theoretical conformational analysis is presented. Using a C(2)-symmetric bis(lactone) as the substrate