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cis-/trans-Tris-[2.1.1]-σ-homobenzenes; Synthesis and Stereochemistry of [σ2 + σ2 + σ2]-Cycloreversions

✍ Scribed by Prof. Dr. Horst Prinzbach; Dipl.-Chem. Hans-Peter Schal; Dr. Dieter Hunkler; Prof. Dr. Hans Fritz

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
232 KB
Volume
19
Category
Article
ISSN
0044-8249

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Stabilized cis-Tris-σ-homobenzenes: Synt
Stabilized cis-Tris-σ-homobenzenes: Syntheses, [σ2 + σ2 + σ2] Cycloreversions
✍ Dipl.-Chem. Wolf Dieter Braschwitz; Dipl.-Chem. Thomas Otten; Dr. Christoph Rück 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 354 KB

rated without material loss by flash chromatography. The bismesylates 19 b/20 b, prepared under standard conditions in 85-90% yield, can be converted into the tetracyclic aziridine 21 b (70-85%) under the conditions used for 5 b (1 0 mmol, triphenylphosphane/THF). Cyclization of 21 b to 22 proceeds