# Synthesis and stereochemical analysis of dynamic planar chiral oxa[7]orthocyclophene

## TL;DR

Researchers synthesized and analyzed a new type of chiral compound with potential for stereochemical stability and transformation.

## Contribution

A new method for synthesizing and analyzing planar chiral oxa[7]orthocyclophene derivatives with stereochemical stability.

## Key findings

- C6-iodo-substituted oxacyclophene derivatives show reasonable stereochemical stability.
- Epoxidation of methyl-substituted oxacyclophene converts planar chirality to central chirality without losing enantiomeric purity.
- Kumada–Tamao coupling enables efficient and divergent synthesis of C6-substituted derivatives.

## Abstract

Planar chiral C6-substituted oxa[7]orthocyclophenes were designed and synthesized, and their stereochemical behavior was analyzed. The Kumada–Tamao coupling of the C6-iodo-substituted oxacyclophene enabled the efficient and divergent synthesis of C6-substituted derivatives. The stereochemical analysis of the oxacyclophenes revealed that the iodo- and methyl-substituted derivatives have reasonable stereochemical stability. The planar chirality of the methyl-substituted oxacyclophene was successfully transformed into central chirality by epoxidation without loss of enantiomeric purity.