Abstract
We report a useful synthetic approach to assemble in/in epoxide, in/out epoxide, and
out/out epoxide in cage systems using the Corey–Chaykovsky reaction and the Peterson
olefination as key steps. In this regard, a variety of pentacycloundecane (PCUD) based
cage compounds containing oxirane rings with diverse stereochemical disposition were
synthesized via a simple synthetic sequence. Five cage diones were used for this purpose, and the
starting cage diones were prepared with easily accessible starting materials such
as 1,4-hydroquinone derivatives and cyclopentadiene. Here, we have used the Diels–Alder
(DA) reaction, a [2+2] photocycloaddition, the Corey–Chaykovsky reaction, and the
Peterson olefination as crucial steps to prepare the target molecules.
Key words
Diels–Alder reaction - photocycloaddition - cage compounds - PCUD - Peterson olefination
- Corey–Chaykovsky reaction -
m-CPBA oxidation