Abstract
Cyclobutene Ring Opening: A Useful Reaction for the Synthesis of Double‐Stranded MoleculesSyntheses and ring‐opening reactions of the compounds endo‐5a – e and 9a – c, all containing cyclobutene rings, are described. From these experiments it is concluded that compound 9a is a useful AB‐type Diels‐Alder monomer for the synthesis of well‐defined double‐stranded molecules. The stereochemistry of the adducts endo‐4b and endo‐5d is determined by X‐ray structure analysis.
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