Stereoselectivity in the TiCl4-Catalyzed
✍
Michal Achmatowicz; Christian Chapuis; Piotr Rzepecki; Janusz Jurczak
📂
Article
📅
1999
🏛
John Wiley and Sons
🌐
German
⚖ 134 KB
👁 2 views
The [4 2] cycloaddition of cyclopentadiene to the (2R )-bornane-10,2-sultam derivative (À)-1b of fumaric monomethyl ester proceeds with high endo and p-facial diastereoselectivity in the presence of 0.5 mol-equiv. of TiCl 4 . The major diastereoisomer endo-(2R,3R )-2b, isolated in 87% yield by cryst