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Abstract
A series of novel calix[4](aza)crowns 2a–2d containing acylhydrazone groups was designed and synthesized via 1+1 condensation of calix[4]‐1,3‐substituted benzaldehyde derivative 1 with bis‐hydrazides in 85–90% yields. They showed good complexation abilities toward α‐amino acids and exhibited complexation selectivity toward tryptophane.
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Acknowledgment
Financial support from the National Natural Science Foundation of China (No. 20402002) and Fujian Natural Science Foundation of China (No. E0220002 and 2006J0155) is gratefully acknowledged.
