## Abstract 2,3โDimethyleneโ2,3โdihydrothiophene (1), the thiophene analog of oโxylylene (oโquinodimethane), was generated __in situ__ from the (trialkylammoniomethyl)โ(trimethylsilylmethyl)thiophene iodides 4 or 5 by fluorideโinduced 1,4 climination, and was trapped by [4 + 2] cycloadditions with
Formation amd reactions of 2,3-dimethylene-2,3-dihydrothiophene
โ Scribed by Albert M. van Leusen; Keimpe J. van den Berg
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 197 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0040-4039
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๐ SIMILAR VOLUMES
The hitherto unknown 2,3-dimethylene-2,3\_dihydrothiophene (the thiophene analogue of ortho-xylylene) and a substituted derivative have been prepared in solution and trapped as Diels-Alder adducts in good to excellent yields. ortho-Xylylene l\_ has found wide application in organic chemistry, notabl
Synthesis of 2,3-dimethylene-7-isopropylidenebenzonorbornene (2) and its cycloaddition reactions with dichloroketene and dienophiles are described. Recently, interesting stereoselectivities in cycloaddition reactions of molecules containing proximal n-bonds have been reported, and the factors contro