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Different N—C—N Formation Reactions of Aromatic Aldehydes and Thiohydantoins Controlled by Lewis Acid Promoters.

✍ Scribed by Feifei Gao; Guangliang Zhang; Suoqin Zhang; Yueming Cheng; Zhan Shi; Yaoxian Li; Junlong Gao


Publisher
John Wiley and Sons
Year
2007
Weight
30 KB
Volume
38
Category
Article
ISSN
0931-7597

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1,3-Dipolar Cycloadditions of N-Benzyl-2
✍ Branislav Dugovič; Lubor Fišera; Hans-Ulrich Reißig 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 189 KB

## Abstract The siteselectivity of cycloadditions of the D‐glyceraldehyde‐derived nitrone **1** and methoxyallene (**2**) is strongly influenced by Lewis acids. The uncatalyzed reaction results in the formation of isomeric isoxazolidines **3a**–**3d** and **4a**–**4c**, whereas in the presence of d