No abstract

A facile and versatile procedure for the synthesis of new functionalized derivatives of 3‐benzyl‐5‐(2‐hydroxyphenyl) isoxazole‐4‐carbaldehyde oxime has been described. The key step in the synthesis involves the ANRORC reaction of in‐situ generated 3‐(phenylethynyl)‐4H‐chromen‐4‐one with NH2OH·HCl.

or the C3-alkylation and O-alkylation of 4-hydroxycoumarins with benzylic, allylic, and corresponding acetates, respectively, under neat conditions at 60 0C with high product yield, Zn(OAc)2.2H2O has been found to be an effective reusable solid superacid catalyst.

In this paper, we report (η5-pentamethylcyclopentadienyl)iridium{1,3-bis(2,3,4,5,6-pentafluorobenzyl)imidazolin-2-ylidene}dichloride, 2, synthesized using a silver transfer agent generated from 1,3-bis(2,3,4,5,6-pentafluorobenzyl)imidazolium bromide. Compound 2 was characterized using 1H and 19F NMR spectroscopy and mass spectrometry, and its structure was determined in a single-crystal X-ray diffraction study.