Ring Cleavage and Ring Contraction of Nitro-Substituted 1-Methyl-2,5-diphenyl-1,4-dithiinium Tetrafluoroborates

Article abstract of DOI:10.1021/jo01294a003

1-Methyl-2,5-diphenyl-1,4-dithiinium tetrafluoroborate (2) underwent selective abstraction of H-3 in aqueous phosphate buffer at pH 6.8 to yield the ring cleavage product (Z)-1-(phenylethynylthio)-2-(methylthio)-1-phenylethylene (4).Methylation of 3-nitro