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Synthesis and conformational behaviour of 1,9,17-triaza[2.2.2]metacyclophane-2, 10, 18-trione derivatives

โœ Scribed by Farouk Eltayeb Elhadi; W. David Ollis; J. Fraser Stoddart; David J. Williams; Kwamena A. Woode

Publisher
Elsevier Science
Year
1980
Tongue
French
Weight
258 KB
Volume
21
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

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) and

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## Abstract Baseโ€catalyzed condensation of 1,2โ€bis[5โ€__tert__โ€butylโ€3โ€(5โ€__tert__โ€butylsalicyl)โ€2โ€hydroxyphenyl]ethane (8) with formaldehyde in xylene affords a novel ethyleneโ€bridged calixareneโ€analogous macrocyclic metacyclophane. However, not the desired 2 has been obtained. Instead, the novel m