Under selected conditions, 1,2:3,4-doubly crowned p-tert-butyl-thiacalix[4]arene in cone conformation and 1,3:2, 4-doubly crowned p-tert-butyl-thiacalix[4]arene in 1,3-alternate conformation were obtained through aminolysis in high to good yield, respectively.
HosseiniM.W., in Calixarenes 2001, AsfariZ., BöhmerV., HarrowfieldJ., and VicensJ., Eds., Kluwer Academic, Publishers, 2001, Chap. 6, p. 110.
3.
LhotákP., Eur. J. Org. Chem., 2004, 1675 (1,2:3,4-doubly crowned p-tert-butylthiacalix[4]arenes have been mentioned, but a detailed synthetic report was not given.
4.
AkdasH., MislinG., GrafE., and HosseiniM. W., Tetrahedron Lett., 1999, 40, 2113.
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CobbenP.L. H. M., EgberinkR. J. M., BomerJ. G., BergveldP., and VerboomW., J. Am. Chem. Soc., 1992, 114, 10573.
