## Abstract Ring‐opening polymerization of the bicyclic lactone mixture **2**, __cis__/__trans__‐3‐oxa‐4‐oxo‐ and __cis__/__trans__‐4‐oxa‐3‐oxobicyclo[5.4.0]undecane with Sn(Oct)~2~ as a catalyst was investigated for the first time (Scheme 1). The lactones were obtained by Baeyer–Villiger oxidation
✦ LIBER ✦
The Synthesis of trans-3-Oxa-4-oxo- and trans-4-Oxa-3-oxobicyclo[5.4.0]undecanes
✍ Scribed by Paquette, Leo A.; Nelson, Norman A.
- Book ID
- 126803504
- Publisher
- American Chemical Society
- Year
- 1962
- Tongue
- English
- Weight
- 397 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0022-3263
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## Abstract Low‐temperature lithium–iodine exchange between tert‐butyllithium and the appropriate iodide has been used to generate 3‐oxa‐5‐hexenyllithium and a variety of 4‐oxa‐5‐hexenyllithiums. The 3‐oxa system is inherently unstable and fragments via facile β‐elimination to give the anion of all