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Sulphur dioxide extrusion from di-2-pyridylmethyl sulphones: synthesis of trans-1,2-di-2-pyridylethene and [2.2] (2,6) pyridinophane

โœ Scribed by Henri J.J.-B. Martel; Malcolm Rasmussen


Book ID
104248207
Publisher
Elsevier Science
Year
1971
Tongue
French
Weight
219 KB
Volume
12
Category
Article
ISSN
0040-4039

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Both enantiomers of the title compound are synthesized for the first time in four steps including a [2+2]-photocycloaddition to build up the cyclobutane backbone and a cerium supported reductive permethylation. During the cerium supported process a complete and selective change in the configuration