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Enantioselective Organocatalytic Addition of Oxazolones to 1,1-Bis(phenylsulfonyl)ethylene: A Convenient Asymmetric Synthesis of Quaternary α-Amino Acids

✍ Scribed by Andrea-Nekane R. Alba; Xavier Companyó; Guillem Valero; Albert Moyano; Ramon Rios


Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
288 KB
Volume
16
Category
Article
ISSN
0947-6539

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Asymmetric 1,4-Addition of Oxazolones to
✍ José Alemán; Andrea Milelli; Silvia Cabrera; Efraim Reyes; Karl Anker Jørgensen 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB 👁 1 views

## Abstract An easy and simple synthetic approach to optically active α,α‐quaternary α‐amino acids using asymmetric organocatalysis is presented. The addition of oxazolones to nitroalkenes catalyzed by thiourea cinchona derivatives provides the corresponding α,α‐quaternary α‐amino acid derivatives