# Stereoselective Syntheses of Cyclic Microsclerodermin Derivatives

## TL;DR

Scientists created six cyclic microsclerodermin derivatives using sugar-based starting materials and specific chemical reactions.

## Contribution

The paper introduces a stereoselective synthetic route for cyclic microsclerodermin derivatives using Sakurai allylations and photochemical rearrangements.

## Key findings

- Six cyclic microsclerodermin derivatives were synthesized from l-xylose and d-arabinose.
- Sakurai allylations showed stereochemical control based on the Lewis acid used.
- Photochemical Wolff rearrangements enabled the formation of complex aminofuranosides.

## Abstract

Starting from l‐xylose and d‐arabinose, six different cyclic microscleroderma derivatives were successfully obtained. Key steps of the syntheses are, on the one hand, Sakurai allylations, whose stereochemical course depends on the Lewis acid used, and on the other hand, photochemical Wolff rearrangements in the presence of complex aminofuranosides. Finally, aromatic side chains were introduced via cross metathesis.

Six different cyclic microsclerodermin derivatives are obtained from l‐xylose and d‐arabinose via stereoselective Sakurai allylations and photochemical Arndt‐Eistert homologations.