𝔖 Bobbio Scriptorium
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“Noncyclic Crown Ethers”: The Terminal Group Concept

✍ Scribed by Prof. Dr. Fritz Vögtle; Dipl.-Chem. Heinz Sieger

Book ID
101543869
Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
339 KB
Volume
16
Category
Article
ISSN
0044-8249

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✦ Synopsis

esters equilibration between ( ) and ( ) occurs on warming or prolonged standing.

Formation of the 3-oxazolin-5-ones ( ) can be recognized from the C=O and C = N bands at ca. 1770 and 1610 cm-', resp., in the IR spectrum (CHC13). The 2-oxazolin-5-ones display these bands at 1810 and 1650 cm-', respectively. Charac-

📜 SIMILAR VOLUMES

The Use of Crown Ethers in Peptide Chemi
The Use of Crown Ethers in Peptide Chemistry – V. Solid-phase Synthesis of Peptides by the Fragment Condensation Approach using Crown Ethers as Non-covalent Protecting Groups
✍ Paolo Botti; Haydn L. Ball; Pierluigi Lucietto; Massimo Pinori; Emanuele Rizzi; 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 702 KB

We have previously described the conditions by which peptide synthesis by the solid-phase fragment condensation approach can be carried out using crown ethers as non-covalent protection for the N alpha-amino group. Here we demonstrate that the procedure can be extended to large, partially protected