Synthesis of multi-functionalized benzofurans through the condensation of ninhydrin and phenols using SSA as a recyclable heterogeneous acid catalyst
A simple and efficient one-pot methodology has been developed for the synthesis of biologically important multi-functionalized 3-(2$$^{\prime }$$′-hydroxyaryl)-2-(2$$^{\prime }$$′-carboxyphenyl)benzofurans using silica sulfuric acid (SSA) as a heterogeneous acid catalyst in DMF medium. The significant advantages of this methodology are the use of SSA as a recyclable solid acid catalyst, operational simplicity, easy availability of the starting materials, and good yield of the products with high atom-economy.
Three new arylobenzofurans from Onobrychis ebenoides and evaluation of their binding affinity for the estrogen receptor.
Three new 2-phenyl-benzofurans, ebenfuran I, ebenfuran II, and ebenfuran III, were isolated from Onobrychis ebenoides. Their structures were elucidated on the basis of chemical and spectral data as 2-(2,4-dihydroxyphenyl)-5-hydroxy-6-methoxy-benzofuran (1), 2-(2,4-dihydroxyphenyl)-3-formyl-4-hydroxy-6-methoxy-benzofuran (2), and 2-(2, 4-dihydroxyphenyl)-3-formyl-4-hydroxy-6-methoxy-5-(3-methyl-buten- 2-y l)-benzofuran (3). The affinity of these compounds for the estrogen receptor was studied using a receptor-binding assay.
Communist History: An Annual Bibliography (2005)
The subject of this bibliography is the scholarly literature of communist history. For the USA coverage is extensive. For the rest of the Anglophone world coverage is selective, while coverage for the rest of the world is more selective still. Coverage of the former and presently communist countries is largely limited to works dealing with the Communist parties of those countries. Anti-communism is covered selectively, with somewhat more emphasis on its interaction with communism than its nature as a movement/ideology per se. Coverage of related topics, i.e. the labor movement, Marxism, other strains of radicalism, etc., is highly selective and limited to items directly relevant to communism. For coverage of current reportage (newspapers, news weeklies, journals of opinion, Internet/WWW discussion lists, etc.) see the Newsletter of the Historians of American Communism and the Historians of American Communism Discussion List (h-hoac@h-net.msu.edu). The Bibliography is organized into seven sections, listed below. Sections 1–5 are form and genre based (monographs, serials, etc.), while sections 6 and 7 are format based (sound and visual, electronic). Entries are arranged alphabetically within each section. Where the number of entries warrants it, a section is divided into USA and Other. There is no index. Please be aware that most citations for items in electronic format are listed under their appropriate form/genre, i.e. articles in electronic serials are listed under serials. Section 7 (Internet, WWW, etc.) only contains citations for items in forms and genres irreducibly unique to the electronic environment, i.e. discussion lists (and postings and threads therein) and for those web sites and other electronic resources not subsumed under categories 1–7. Items cited are from the calendar year in the title of the Bibliography, with two exceptions, Internet/WWW items, where publication/creation date information is often unavailable or indeterminate, and older items not cited