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The ring expansion of a cyclic sulfonium ylide through a 1,3-acyl rearrangement

✍ Scribed by Teruaki Mukaiyama; Moriaki Higo

Publisher: Elsevier Science
Year: 1970
Tongue: French
Weight: 196 KB
Volume: 11
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)99998-2

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✦ Synopsis

In the preceding paper 1) , it was shown that 3,4-furandicarboxylic acid

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## Abstract For Abstract see ChemInform Abstract in Full Text.

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A series of cyclic sulfonium ylides 4a-h reacted with titanium(IV) chloride in the presence of triethylamine to give the corresponding fused 2,3-dihydro-1H-thieno [3,4-b]pyrroles 5a-h, via a ring opening and recyclization. In contrast, treatment of compounds 4a, 4b, 4e and 4f with titanium(IV) chlor