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Synthesis 1989; 1989(4): 329-331
DOI: 10.1055/s-1989-27246
DOI: 10.1055/s-1989-27246
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3-Pyrrolylsulfonium Salts and 3-Pyrrolylsulfonium Ylides
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Publication History
Publication Date:
17 September 2002 (online)
The 2-pyrrolylsulfonium salts 2 rearrange in trifluoroacetic acid into the thermodynamically more stable 3-pyrrolylsulfonium salts 5. These can be deprotonated (R1 = H) by potassium hydroxide to give the extremely hygroscopic and relatively unstable 3-sulfoniopyrrolide ylides 6.