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Ring-Closing Metathesis of Allylic O,O- and N,O-Acetals.

✍ Scribed by Floris P. J. T. Rutjes; et al. et al.

Publisher
John Wiley and Sons
Year
2010
Weight
37 KB
Volume
33
Category
Article
ISSN
0931-7597

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A variety of allylic O,O-and N,O-acetals were synthesized using a mild palladium-catalyzed coupling of an alcohol or sulfonamide with an alkyl or aryl 1,2-propadienyl ether. The resulting linear acetals were used for the synthesis of unsaturated rings via ring-closing metathesis, in which the acetal

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## Abstract Ring closing metathesis of acetal‐tethered enynes proceeds smoothly in the presence of ethene and Grubbs II catalyst to give perhydropyran and ‐oxetan derivatives.