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- W2034345304 abstract "Reactions of 3-(5-aryl-2-furyl)propenoic, 3-(2-benzo[ b ]furyl)propenoic and 3-(5-ethoxycarbonyl-4 H -furo[3,2- b ]-2-pyrrolyl)propenoic acids with thionyl chloride in the presence of triethylbenzylammonium chloride were investigated. The obtained 2-arylthieno[3,2- b ]-furan-5-carboxylic acid chlorides Ia - Ic and 3-chlorothieno[3,2- b ]benzo[ b ]furan-2-carboxylic acid chloride afforded in substitution nucleophilic reactions the corresponding esters V and carboxylic acids VI which were decarboxylated to VII . 3-Chlorothieno[3,2- b ]benzo[ b ]furan-2-carboxylic acid chloride ( Id ), 6-ethoxycarbonyl-3-chlorothieno[2',3':4,5]furo[3,2- b ]pyrrole-2-carboxylic acid chloride ( IV ), and ethyl 3-chlorothieno[2',3':4,5]furo[3,2- b ]indole-2-carboxylate ( VIII ), synthesized under conditions of triethylphosphite reduction from ethyl 6-chloro-2-(2-nitrophenyl)thieno[3,2- b ]furan-5-carboxylate ( Va ), are new heterocyclic systems." @default.
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- W2034345304 date "1986-01-01" @default.
- W2034345304 modified "2023-10-18" @default.
- W2034345304 title "Preparation and reactions of thieno[3,2-b]furan derivatives" @default.
- W2034345304 doi "https://doi.org/10.1135/cccc19861685" @default.
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