Preparation and reactions of isoflavone heteroanalogs (a review) Page 1 Chemistry of
Heterocyclic Compounds, Vol.35, No. 1, 1999 PREPARATION AND REACTIONS OF …

Published data on the reaction of flavones, isoflavones, and their analogs 2-and 3-hetaryl
chromones with hydroxylamine are reviewed, classified, and analyzed. The …

Recyclization of the chromone ring in several natural isoflavonoids and their analogs by
reaction with hydroxylamine was studied. It has been found that the most suitable base for …

Catalytic homogeneous hydrogenation of 7-methoxy-3-phenylchromone and other
substrates was achieved in the presence of cationic iridium complexes and base as co …

Considering previous results [2], we used 2, 4, 6-trihydroxydeoxybenzoins 3a-c to
synthesize analogs of natural isoflavones. These are the most convenient starting materials …

Recyclization of 7-hydroxy-3-(4-phenyl-1,2,4-triazol-3-yl)-chromones using binucleophiles
Page 1 Chemistry of Heterocyclic Compounds, Vol. 42, No. 4, 2006 RECYCLIZATION OF 7-HYDROXY …

The interaction has been studied of a series of substituted 3-hetaryl-7-hydroxychromones
with amino acids and formaldehyde (reactants ratio 1: 1: 2 respectively). In the case of …

Acylation of 7-hydroxyisoflavones proceeded readily in pyridine at room temperature. The
acylating reagents were chlorides of naturally occurring acids (trimethylgallic, veratric …

Abstract Treatment of substituted 2-(2, 4-dihydroxyphenacyl) thiazole and 2-(2, 4-
dihydroxyphenacyl) benzothiazole with propionic and isobutyric anhydrides gives the …

The reaction of natural isoflavones formononetin and cladrin with primary amines and
formalin in the presence of a base catalyst was studied. Several novel substituted 9, 10 …