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Inherently chiral calix[4]arenes with asymmetrical superposition of substituents at the lower and the upper rims of macrocycle

✍ Scribed by Myroslav O Vysotsky; Maxym O Tairov; Vladimir V Pirozhenko; Vitaly I Kalchenko

Publisher: Elsevier Science
Year: 1998
Tongue: French
Weight: 212 KB
Volume: 39
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(98)01246-5

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A comparative study on a series of penta-O-alkylated p-H-calix[5]arenes lb-e and p-tertbutylcalix[5]arenes lg-m shows that the former are inherently mobile and adopt in solution non-cone conformations. The 1,2-alternate conformation for penta-O-benzyl ether lc was proven by single-crystal X-ray anal