Methylation of partially O-benzylated p-tert-butylcalix[6]arenes followed by hydrogenolysis constitutes an efficient method for the preparation of partially O-alkylated calix[6]arenes in gram amounts, without adhering to column chromatography separations. Selective de-tert-butylation followed by halogenation, or ipso-nitration of these precursors affords calix[6]arenes containing bromo- or nitrosubstituents, respectively, at precise positions of the upper rim.

Selective Functionalization of Calix[6]arenes at the Upper Rim / J., DE MENDOZA; M., Carramolino; F., Cuevas; P. M., Nieto; P., Prados; D. N., Reinhoudt; W., Verboom; Ungaro, Rocco; Casnati, Alessandro. - In: SYNTHESIS. - ISSN 0039-7881. - (1994), pp. 47-50.

Selective Functionalization of Calix[6]arenes at the Upper Rim

UNGARO, Rocco;CASNATI, Alessandro
1994-01-01

Abstract

Methylation of partially O-benzylated p-tert-butylcalix[6]arenes followed by hydrogenolysis constitutes an efficient method for the preparation of partially O-alkylated calix[6]arenes in gram amounts, without adhering to column chromatography separations. Selective de-tert-butylation followed by halogenation, or ipso-nitration of these precursors affords calix[6]arenes containing bromo- or nitrosubstituents, respectively, at precise positions of the upper rim.
1994
Selective Functionalization of Calix[6]arenes at the Upper Rim / J., DE MENDOZA; M., Carramolino; F., Cuevas; P. M., Nieto; P., Prados; D. N., Reinhoudt; W., Verboom; Ungaro, Rocco; Casnati, Alessandro. - In: SYNTHESIS. - ISSN 0039-7881. - (1994), pp. 47-50.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2313409
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