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Synthesis 1997; 1997(9): 1073-1076
DOI: 10.1055/s-1997-1308
DOI: 10.1055/s-1997-1308
paper
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Synthesis of 4-tert-Butylcalix[4]arenes Bearing Two Schiff-Base Units at the Lower Rim
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Publication History
Publication Date:
31 December 2000 (online)
An approach for synthesis of 4-tert-butylcalix[4]arenes bearing two Schiff base units at the lower rim 4a-u in excellent yields is described. All 21 compounds 4a-u have been achieved by treatment of 1,3-distally substituent 4-tert-butylcalix[4]arene amine 3 with aromatic or heterocyclic aldehydes in ethanol.
Schiff-base