Williams, Selective Bromination of Substituted Acetophenones
with Dioxan Dibromide, Aust.
In the non-polar extract, substances such as steroids, terpenes, acetophenones
, aglycone, waxes, sapogenins, iridoids and sesquiterpenes, highly lipophilic substances can befound (CECHINEL & YUNES, 1998; CANTRELL et al.
General procedures for iodination of hydroxy aromatic aldehydes, hydroxy acetophenones
, substituted anilines and phenols in ethanol, acetic acid and 2-methoxyethanol:
They can be obtained from the respective substituted acetophenones
via the intermediate substituted 1-phenylethylformamides.
1987) reported the synthesis of seven 3-arylidene flavanone by condensing 2-Hydroxy acetophenones
with aromatic aldehydes in aqueous alkaline medium, along with corresponding chalcones.
The extension of the condensation-cyclization of acetophenones
with other 1,4-dianion-type systems, such as dilihiated acetophenone
phenylhydrazones or carboalkoxyhydrazones, will also be presented.
6,184,417 B1: Bayer AG, Leverkusen, Germany, has patented a method for preparing acetophenones
with a fiuoralkyl-substituted aromatic nucleus.
It behaves as those of [Alpha]-substituted acetophenones
since it undergoes a fast [Beta] cleavage yielding the corresponding benzene sulfonyl and acetophenyl radicals (10).
Acylhydrazide Schiff bases were synthesized by condensening different acylhyrazides with different aromatic aldehydes and acetophenones
by refluxing in ethanol for 2 to 3 hours and reactions were monitored by TLC (Scheme-1).
18] synthesized a large number of chalcones by reacting differentially substituted acetophenones
with 2,4-dimethoxybenzaldehyde and 3,4,5-trimethoxybenzaldehydes using Claisen-Schmidt condensation and analyzed their anticancer and anti-inflammatory activities.
10:00 Preparation of Dihydroisoxazoles and Dihydropyrazoles from Dilithiated Oximes or Dilithiated Hydrazones and Acetophenones
, Matthew J.
Aggregation inhibitory activity of minor acetophenones
from Paeonia species.