## Abstract Baseโcatalyzed condensation of 1,2โbis[5โ__tert__โbutylโ3โ(5โ__tert__โbutylsalicyl)โ2โhydroxyphenyl]ethane (8) with formaldehyde in xylene affords a novel ethyleneโbridged calixareneโanalogous macrocyclic metacyclophane. However, not the desired 2 has been obtained. Instead, the novel m
Complexation properties and characterization of four conformers of a [2.1.2.1]metacyclophane
โ Scribed by Tsuyoshi Sawada; Akihiko Tsuge; Thies Thiemann; Shuntaro Mataka; Masashi Tashiro
- Publisher
- Springer Netherlands
- Year
- 1994
- Tongue
- English
- Weight
- 605 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0923-0750
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## Abstract The stereochemistry in solution of three octathia[2.2.2.2]metacyclophanes has been investigated by means of ^1^H NMR spectroscopy. The results lead to the conclusion that the saddle or crown conformation is preferred for these compounds, depending on the substitution pattern of the cons
The 1,9, 17 -triaza[2 2.21 metacyclophane-2, 10, 18-trlone derlvatlves (1) -( 2) have been synthesised X-Ray crystallography shows that the 1,9, 17trimethyl derivative (3) adopts a Crown conformation (11) m the solid state. n m r. spectroscopy lndlcates that both the 1, 9-dlmethyl-17-benzyl- (2) a