1779-54-0Relevant academic research and scientific papers
Aldehyde to Ketone Homologation Enabled by Improved Access to Thioalkyl Phosphonium Salts
Fragis, Meghan,Deobald, Jackson L.,Dharavath, Srinivas,Scott, Jeffrey,Magolan, Jakob
supporting information, p. 4548 - 4552 (2021/06/28)
Phosphines were previously unusable as Pummerer-type nucleophiles due to competing redox chemistry with sulfoxides. Here we circumvent this problem to achieve a formal phosphine Pummerer reaction that offers thioalkyl phosphonium salts that, in turn, give rise to diverse vinyl sulfides via Wittig olefinations. Thirty vinyl sulfides are thus prepared from (alkylthioalkyl)triphenyl phosphonium salts and aldehydes. The hydrolysis of these vinyl sulfides offers an efficient and versatile two-step one-carbon homologation of aldehydes to ketones.
A simplified preparation of vinyl sulfides, selenides and tellurides by a Wittig-type reaction
Silveira, Claudio C.,Begnini, Mauro L.,Boeck, Paula,Braga, Antonio L.
, p. 221 - 224 (2007/10/03)
The preparation of several vinyl sulfides, selenides and tellurides by Wittig-type reaction in a one-pot procedure is described. The chalcogenyl triphenylphosphoranes 3 are formed 'in situ' by the reaction of chloromethyl phenyl chalcogenide, potassium tert-butoxide and triphenylphosphine. Reaction of 3 with carbonyl compounds affords the vinyl chalcogenides 6-9 with preferential Z-configuration.
PYROLYSIS OF α-ACYL,α-THIO PHOSPHORANES THIOACETYLENES
Braga, Antonio L.,Comasseto, Joao V.,Petragnani, Nicola
, p. 1111 - 1114 (2007/10/02)
Pyrolysis of α-acyl,α-thio phosphoranes affords thioacetylenes in a good yield.The thio acethylenes are precursors of terminal and alkyl disubstituted acetylenes.
Synthesis of 1-Alkylthiovinyl- and 1-Arylthiovinyl-phosphonium Salts and Their Use in the Formation of Cyclopentanes
Cameron, Andrew G.,Hewson, Alan T.
, p. 2979 - 2983 (2007/10/02)
The synthesis of 1-methylthiovinyltriphenyl- and 1-phenylthiovinyltriphenyl-phosphonium salts (1; R = SMe and R = SPh) by introduction of a methylene group α- to the phosphonium centre in Ph3P+-CH2SR is described.The scope and limitations of the method are indicated.The salts (1; R = SMe and R = SPh) are used in the formation of highly functionalised cyclopentanes via an intramolecular Wittig reaction.
Phosphonium salts as herbicides
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, (2008/06/13)
Use as herbicides of certain phosphonium salts of the formula wherein the symbols have defined meanings.
