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- W1973322031 endingPage "2824" @default.
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- W1973322031 abstract "1,3-Di-t-butyl- and 1,3-di-t-butyl-4,6-dimethylthieno[3,4-c]thiophenes (1g and 1h) are generated by Pummerer dehydration of the corresponding sulfoxides (4 and 5, respectively) in boiling acetic anhydride and can be trapped with N-phenylmaleimide (NPM). Both endo- and exo-adducts are formed from 1g and NPM, while only exo-adduct is formed from 1h and NPM. Reduction and isomerization of the starting materials occur in the reactions of 4 and 5 with trifluoroacetic anhydride. The reaction of 5 with trifluoroacetic anhydride in the presence of 2,6-lutidine also gives 4,6-di-t-butyl-1-(trifluoroacetylmethylene)-3-methyl-1H,3H-thieno[3,4-c]thiophene." @default.
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- W1973322031 date "1992-10-01" @default.
- W1973322031 modified "2023-09-26" @default.
- W1973322031 title "Generation and Characterization of 1,3-Di-<i>t</i>-butyl- and 1,3-Di-<i>t</i>-butyl-4,6-dimethylthieno[3,4-<i>c</i>]thiophenes" @default.
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- W1973322031 doi "https://doi.org/10.1246/bcsj.65.2821" @default.
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