117130-95-7Relevant academic research and scientific papers
Synthesis of Halothiophene S,C-Ylides and the Corresponding 1,4-Oxathiocines
Meth-Cohn, O.,Vourinen, E.,Modro, T. A.
, p. 4822 - 4827 (1989)
Crystalline halothiophenium S,C-ylides 2, stabilized by α,α-biscarbonyl (or sulfonyl) substituents have been synthesized from the halo-substituted thiophenes and the corresponding diazoalkanes in the presence of rhodium(II) catalyst.Ylides 2 undergo smoot
A Novel Approach to 1,4-Oxathiocines> The Thermal Rearrangement of Thiophenium Methylides
Meth-Cohn, Otto,Vourinen, Eino
, p. 138 - 140 (1988)
2,5-Disubstituted thiophenes react at ambient temperature under rhodium acetate catalysis with various diazoketones to give thiophenium methylides which rearrange thermally to give 1,4-oxathiocines, as confirmed by an X-ray crystal structure determination; one of these, 3-ethoxycarbonyl-5,8-dichloro-2-methyl-1,4-oxathiocine, corrects a supposed cyclopropathiophene structure and further rearranges to give ethyl 2,4-dichloro-5-hydroxy-6-methylbenzoate.
