39167-49-2Relevant articles and documents
Electrochemical preparation of α,α′-dicarbonylselenides
Otero, María Dolores,Batanero, Belen,Barba, Fructuoso
, p. 4609 - 4612 (2004)
A facile preparation of α,α′-dicarbonylselenides has been performed by reaction of α-carbonyl selenocyanates with an enolate, electrogenerated by reduction of a carbon-halogen bond.
ELECTROCHEMICAL SYNTHESIS OF SELENO AND TELLURO DERIVATIVES IN MeCN
Degrand, Chantal,Prest, Rita,Nour, Mohamed
, p. 201 - 210 (2007/10/02)
Large-scale electrolysis with concurrent sonication in MeCN allows for the synthesis of a large variety of seleno and telluro derivatives.Aliphatic chalcogenides REER or RER (E = Se, Te) can be prepared by reduction of E powder to E2(2-) or E(2-), followed by addition of an alkyl halide RX.Depending upon R, substitution can compete with homogeneous electron or H+ transfers.RE+ can be prepared by anodic oxidation of REER, and trapped by nucleophiles and olefins.The synthesis of aromatic chalcogenides ArEAr'can be carried out by electrochemically inducedSRN1 substitution.The yields are improved by redox catalysis.Under such conditions, the synthesis of PhEAr (Ar = NCC6H4, PhCOC6H4) proceeds in good yields.ArEEAr and ArEAr can be prepared by cathodic reduction of PhEAr.
SYNTHESES WITH DIKETO SELENIDES
Nakayama, Juzo,Shibuya, Masahiro,Ikuina, Yoji,Murai, Fumito,Hoshino, Masamatsu
, p. 149 - 156 (2007/10/02)
We report a) a modified synthesis of diketo selenides, b) preparation of 2,5-diacylselenophenes by condensation of diketoselenides with glyoxal, c) preparation of poly-substituted selenophenes by intramolecular reductive coupling reaction of diketo selenides with low-valent titanium reagent under controlled conditions (0 degC) followed by dehydratation of the resulting 3,4-dihydroxyselenolanes, and d) formation of 2,5-dihydroselenophenes and 1,3-dienes by treatment of diketo selenides with the low-valent titanium reagent in refluxing tetrahydrofuran.
