20052-66-8Relevant academic research and scientific papers
Reductive (3 + 2) Annulation of Benzils with Pyrylium Salts: Stereoselective Access to Furyl Analogues of cis-Chalcones
Tan, Pengwei,Wang, Sunewang R.
, p. 6029 - 6033 (2019)
An unprecedented reductive (3 + 2) annulation of both symmetrical and unsymmetrical benzils with pyrylium salts mediated by P(NMe2)3 is described, leading to facile and stereoselective access to the challenging cis-chalcones decorate
Synthetic studies on a series of functionalized pyrylium salts, 4-chloro- and 4-bromophosphinines
Nagahora, Noriyoshi,Tokumaru, Hiroshi,Ikaga, Shinpei,Hanada, Takuya,Shioji, Kosei,Okuma, Kentaro
, p. 1880 - 1887 (2018/03/07)
A series of new pyrylium salts that bear sulfonate and phosphonate groups were obtained from the reactions between 2,6-diphenyl-4H-pyran-4-one, sulfonic anhydride, and chlorophosphates, and analyzed spectroscopically. Furthermore, treatment of 2,6-diphenyl-4H-pyran-4-one with phosphoryl chloride or bromide afforded the corresponding 4-chloro- and 4-bromopyrylium tetrafluoroborates in good yield. Subsequently, the synthesis of the corresponding 4-chloro- and 4-bromophosphinines was accomplished by treating the respective chloro- and bromopyrylium tetrafluoroborates with tris(trimethylsilyl)phosphine.
ELECTROSYNTHESIS OF 2,2',6,6'-TETRAARYL 4,4'-BIPYRANNYLIDENES WITH EIGHT FLEXIBLE CHAINS.
Amatore, Christian,Jutand, Anny,Pflueger, Fernando,Jallabert, Colette,Strzelecka, Helena,Veber, Michele
, p. 1383 - 1386 (2007/10/02)
2,2',6,6'-tetraaryl 4,4'-bipyrannylidene with eight flexible chains are synthesized by electrochemical reduction of the corresponding 2,6-diarylpyrylium salts.
Some Reactions of 4H-Pyrylium Salts with Tributylphosphine and with Tertiary Amines
Reynolds, G. A.,Chen, C. H.
, p. 1235 - 1237 (2007/10/02)
The phosphonium salt from tributylphosphine and 2,6-di(4-methoxyphenyl)pyrylium perchlorate (3) reacted with diisopropylethylamine in acetonitrile to give 2,2',6,6'-tetra(4-methoxyphenyl)-Δ4,4'-bi-4H-pyran in quantitative yield.The reaction of 3 and other 4H-pyrylium salts with tertiary amines gave 4H-pyrans.
