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A Simple Two Steps Ytterbium Triflate-Catalyzed Preparation of 2,2-Dimethyl-2H-chromenes from Salicylaldehydes and 2-Methylpropene.

✍ Scribed by Soizic Prado; Yves L. Janin; Pierre-Etienne Bost


Book ID
102005364
Publisher
John Wiley and Sons
Year
2007
Weight
24 KB
Volume
38
Category
Article
ISSN
0931-7597

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A simple two steps ytterbium triflate-ca
✍ Soizic Prado; Yves L. Janin; Pierre-Etienne Bost 📂 Article 📅 2006 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 221 KB

## Abstract magnified image The preparation of various 2,2‐dimethyl‐2__H__‐chromenes was achieved in two steps __via__ an ytterbium triflate‐catalysed reaction between salicylaldehydes, trimethylorthoformate and 2‐methylpropene. From salicylaldehyde, two reaction products were characterised: 4‐met