Improvement Method for Synthesis of p-tert-butylthiacalix[n]arenes; Effect of Using Base Catalyst with Carboxylic Acid
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The improved method for synthesis of p-tert-butylthiacalix[n]arenes (TCnAs) by using precursor which is sulfur-bridged oligomer of p-tert-butylphenol with acetic acid and terephthalic acid as a template in a combination with base catalyst such as NaOH and NaH gave much better yields for TC6A (10.6 %) and TC8A (7.8 %), respectively. Such stronger base NaH than NaOH could bring down a reaction temperature for synthesis of TC8A.
Keywordsbase catalyst calixarene sodium hydride thiacalixarene
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- 1.Pavel Lhoták: Eur. J. Org. Chem. 1675 (2004)Google Scholar
- 2.(a) Y. Kondo, K. Endo, and F. Hamada: Chem. Commun. 711 (2005); (b) K. Endo, Y. Kondo, Y. Aoyama, and F. Hamada: Tetrahedron Lett. 44, 1355 (2003); (c) T. Kajiwara, N. Kon, S.␣Yokozawa, T. Ito, N. Iki, and S. Miyano: J. Am. Chem. Soc. 124, 11274 (2002)Google Scholar
- 3.T. Sone, Y. Ohba, K. Moriya, and H. Kumada, Abstract Book of Workshop on Calixarenes and Related Compounds, p. PS/B-36, 2–4, June 1993, Fukuoka, JapanGoogle Scholar
- 7.J. Vicens and V. Böhmer (eds.): Calixarenes, A Versatile Class of Macrocyclic Compounds, Kluwer Academic Publishers (1990)Google Scholar