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Dihydrothiophenes. 4. Stereochemistry of dihydrothiophene formation from vinylphosphonium salts

โœ Scribed by McIntosh, John M.; Masse, Gary M.

Book ID
127204209
Publisher
American Chemical Society
Year
1975
Tongue
English
Weight
718 KB
Volume
40
Category
Article
ISSN
0022-3263

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## Abstract 2,3โ€Dimethyleneโ€2,3โ€dihydrothiophene (1), the thiophene analog of oโ€xylylene (oโ€quinodimethane), was generated __in situ__ from the (trialkylammoniomethyl)โ€(trimethylsilylmethyl)thiophene iodides 4 or 5 by fluorideโ€induced 1,4 climination, and was trapped by [4 + 2] cycloadditions with