Formation and [4 + 2] cycloaddition reac
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Keimpe J. van den Berg; Albert M. van Leusen
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Article
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2010
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Elsevier Science
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English
⚖ 951 KB
## Abstract 2,3‐Dimethylene‐2,3‐dihydrothiophene (1), the thiophene analog of o‐xylylene (o‐quinodimethane), was generated __in situ__ from the (trialkylammoniomethyl)‐(trimethylsilylmethyl)thiophene iodides 4 or 5 by fluoride‐induced 1,4 climination, and was trapped by [4 + 2] cycloadditions with