𝔖 Bobbio Scriptorium
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Joining two 4ShPS machines into one unit

✍ Scribed by G. I. Mitkevich

Publisher
Springer US
Year
1960
Tongue
English
Weight
147 KB
Volume
17
Category
Article
ISSN
0361-7610

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✍ Guo-Ping Xue; Jerald S. Bradshaw; Ning Su; Krzysztof E. Krakowiak; Paul B. Savag 📂 Article 📅 2000 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 214 KB

## Abstract Syntheses of 1,3–2,4‐calix[4]bis‐crown ethers (**1** and **2**) fixed in the 1,3‐alternate conformation by 1,3‐ and 2,4‐bridges made of two modified polyether chains each containing two 1,2‐phenylene residues and one pyridine or anisyl unit are reported. The structures of compounds **1*