ChemInform Abstract: SYNTHESIS OF 4‐BROMO‐3‐(2‐HYDROXYPHENYL)‐1,5‐DIPHENYLPYRAZOLINES AND PYRAZOLES

Abstract

Die Bromierung der Pyrazoline (I) mit N‐Bromsuccinimid (NBS) führt zu den Brompyrazolinen (II).

One Pot Synthesis of 1-(2-Hydroxyphenyl)-3-Phenylpropane-1,3-Diones by Modified Baker–Venkataraman Transformation using Microwave Irradiation

“…1-(2-Hydroxyphenyl)-3-phenylpropane-1,3-diones constitute an important class of compounds 1 of natural occurrence and are also used as intermediates for the synthesis of flavones, 2 coumaran-3-ones, 3 isoxazoles, 4 pyramidines 5 and pyrazolines 6 which possess a broad spectrum of pharmacological activities. 7 The most convenient method for synthesis of these compounds involves base-catalysed Baker-Venkataraman rearrangement of 2-aroyloxyacetophenones.…”