105654-27-1Relevant articles and documents
Green hydroselenation of aryl alkynes: Divinyl selenides as a precursor of resveratrol
Perin, Gelson,Barcellos, Angelita M.,Luz, Eduardo Q.,Borges, Elton L.,Jacob, Raquel G.,Lenard?o, Eder J.,Sancineto, Luca,Santi, Claudio
, (2017/03/08)
A simple and efficient protocol to prepare divinyl selenides has been developed by the regio- and stereoselective addition of sodium selenide species to aryl alkynes. The nucleophilic species was generates in situ, from the reaction of elemental selenium with NaBH4, utilizing PEG-400 as the solvent. Several divinyl selenides were obtained in moderate to excellent yields with selectivity for the (Z,Z)-isomer by a one-step procedure that was carried out at 60°C in short reaction times. The methodology was extended to tellurium, giving the desired divinyl tellurides in good yields. Furthermore, the Fe-catalyzed cross-coupling reaction of bis(3,5-dimethoxystyryl) selenide 3f with (4-methoxyphenyl)magnesium bromide 5 afforded resveratrol trimethyl ether 6 in 57% yield.
Preparation of symmetrical divinyl tellurides via an ylidation reaction
Silveira, Claudio C.,Perin, Gelson,Boeck, Paula,Braga, Antonio L.,Petragnani, Nicola
, p. 44 - 47 (2007/10/03)
Symmetrical divinyl tellurides are prepared by sequential reaction of bis-(triphenylmethyl phosphonium) halotellurate with base or by the reaction of triphenylmethylidene phosphoranes with TeCl4, followed by aldehydes. The products are converted to E-α,β-unsaturated aldehydes by treatment with n-BuLi and DMF.
REACTION OF TELLURIUM WITH PHENYLACETYLENE: A REINVESTIGATION
Singh, Harkesh B.,Wudl, Fred
, p. 441 - 442 (2007/10/02)
The reaction of powdered tellurium with phenylacetylene under strongly basic conditions yields cis and trans-2,6-diphenyl-1,4-ditellurafulvenes, rather than Z and E isomers of a five-membered cyclic ditelluride, as recently reported.