Chromone synthesis

Benzofurans, 4, 531-597, 657-712 chroman synthesis from, 3, 785 chromene synthesis from, 3, 753 chromone synthesis from, 3, 828 CNDO, 4, 536... 

Benzopyrylium perchlorate, 3-ethyI-reduction, 3, 662 Benzopyrylium salts C NMR, 3, 590 chromene synthesis from, 3, 756 chromone synthesis from, 3, 829 electrophilic substitution, 2, 49 mass spectra, 3, 618 reactions... 

Pyran-4-one, 2,2,5-trimethyl-2,3-dihydro-photodimerization, 3, 720 4H-Pyran-4-one, 2,3-dihydro-2,3,5-trimethyl-6-( 1 -methyl-2-oxobutyl)-synthesis, 3, 844 Pyranones alkylation, 2, 56 aromaticity, 3, 632, 633 C NMR, 3, 587, 635 H NMR, 3, 580 cardiac glycosides, 3, 883 chromone synthesis from, 3, 830 colour couplers... 

ROBINSON - ALLAN - KOSTANECKI Chromone Synthesis Synthesis of chromones or coumannes from o acyioxy aromatic ketones... 

Cholinesterase, 294 Chromone synthesis, 391 Ciclafrine, 266 Ciclopirox, 282 Cicloprofen, 217 Cimetidine, 253 Cinanserin, 96 Cinepazide, 301... 

Acetic acid, (3,5,6-trichloro-2-pyridinyloxy)-as herbicide, 2, 513 Acetic formic anhydride chromone synthesis from, 3, 820 Acetoacetic acid ethyl ester... 

In an unusual modified chromone synthesis, enaminones formally derived from o-hydroxyacetophenone react with selenium oxychloride prior to cyclisation resulting in the formation of Se-bridged bischromones. Various reactions at Se are described, including fission of an Se-Se bond, leading to chromone-3-seleninic acid (95JHC43). 

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