Abstract Two novel fluorescent probes L1 and L2 for recognizing Al 3+ have been prepared by cooperating salicylaldehyde‐derived Schiff base groups onto the upper rim of calix[4]arene. Of these probes, is most effective at , displaying a highly selective fluorescence “on” response with an emission wavelength 478 nm Stokes shift 88 nm. Additionally, probe can form 1 : coordination complex binding...

Condensation of aromatic aldehydes with benzoyl acetone under specified conditions yieldedtwo series of polycarbonyl compounds in which the keto group is attached to olefinic linkage.Spectral and analytical data revealed the formation of an unsaturated triketone from pyridine-3-carbaldehyde and unsaturated diketone from furfural, salicylaldehyde and 2-hydroxynaphthaldehyde. Analytical, IR, 1H N...

Abstract Synthesis of assumed natural (12R,13S)-enantiomers pyriculariol (1) and dihydropyriculariol (2), phytotoxins isolated from rice blast disease fungus, Pyricularia oryzae, was achieved using Wittig reaction or microwave-assisted Stille coupling as the key step. The synthesis revealed that 1 2 are racemates. Foliar application test on a leaf indicated both salicylaldehyde core side chain ...