ChemInform Abstract: Chiral Cations in 4 + 3 Cycloadditions.

✍ Scribed by Michael Harmata; Darin E. Jones; Mehmet Kahraman; Uday Sharma; Charles L. Barnes

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 28 KB
• Volume: 30
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199923052

✦ Synopsis

Chiral Cations in 4 + 3 Cycloadditions.

-Chiral allylic acetal (I) reacts with furan in the presence of Lewis acids to give [4 + 3] cycloadducts with diastereoselectivities depending on the Lewis acid and the reaction conditions used. Similar cycloaddition between (I) and cyclopentadiene can be achieved, however, lower diastereoselectivity is observed. -(HARMATA, MICHAEL;