77134-48-6Relevant academic research and scientific papers
Transylidations with Phenyliodonium Bis(aryl/alkylsulfonyl) Methylides
Hadjiarapoglou, Lazaros,Varvoglis, Anastassios
, p. 913 - 915 (2007/10/02)
The title compounds have been used to prepare a stable triethoxyphosphonium ylide and also several new ylides of pyridine, triphenylphosphine, triphenylarsine and some sulphur compounds.
A Gentle Method for the Preparation of a Variety of Ylides (As, Sb, Bi, S, Te, Thiouronium) from Diazo Compounds
Glidewell, Christopher,Lloyd, Douglas,Metcalfe, Shirley
, p. 319 - 321 (2007/10/02)
Bis(hexafluoroacetylacetonato)copper(II) is a very effective catalyst for the preparation of ylides from diazo compounds under mild conditions even down to room temperature.It appears that the lower the temperature at which the reaction can be conducted the purer the product which results.Its use in preparing arsonium, stibonium, bismuthonium, sulphonium, telluronium, and thiouronium ylides is described.
THE RECTIONS OF SOME BROMO-DERIVATIVES OF COMPOUNDS HAVING REACTIVE METHYLENE GROUPS WITH THIOUREAS, AND OF SOME RESULTANT THIOURONIUM SALTS WITH BASE
Lloyd, Douglas,Millar, Ross W.
, p. 2675 - 2679 (2007/10/02)
Whereas α-bromocarbonyl compounds react with thiourea to give thiazole derivatives, bromomalononitrile and bromobis(phenylsulphonyl)methane underwent protodebromination.With N,N,N',N'-tetramethylthiourea many of the bromo compounds gave thiouronium salts but protodebromination sometimes supervened.N,N'-Disubstituted thioureas provided examples of salt formation, protodebromination and cyclisation reactions.The only thiouronium salt to provide an ylide on treatment with base was the S--N,N,N',N'-tetramethylthiouronium bromide.N,N'-Disubstituted salts gave isothioureas rather than ylides.Thiouronium dicyano methylide underwent cyclisation rather than a Wittig reaction when heated with p-nitrobenzaldehyde, and the aldehyde condensed with the resultant 2-aminothiazole.
