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- W2000622698 abstract "The ring closure reaction of methyl 2,3-bis(chloromethyl)thiophene-5-carboxylate with several primary amines gives a series of 5,6-dihydro-4H-thieno-[2,3-c]pyrroles. Oxidation of some of these dihydro compounds, using aqueous hydrogen peroxide in methanol, furnishes the corresponding N-oxides. When the nitrogen atom possesses an aromatic substituent and the oxidation is carried out with aqueous hydrogen peroxide in formic acid, Meisenheimer 1 rearrangement products instead of N-oxides are formed. The structure of one of the Meisenheimer products was elucidated by an independent synthesis of its degradation product. 5H-Thieno[2,3-c]pyrroles are prepared by three separate methods: (a) dehydration of the N-oxides; (b) autoxidation of the dihydrothieno[2,3-c]-pyrroles; (c) dehydrogenation of the dihydro compounds with chloranil." @default.
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- W2000622698 title "Iso-anellated thienopyrroles: The chemistry of 5,6-dihydro-4<i>H</i> -thieno[2,3-<i>c</i> ]pyrroles and 5<i>H</i> -thieno[2,3-<i>c</i> ]pyrroles" @default.
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- W2000622698 doi "https://doi.org/10.1002/recl.19700890611" @default.
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