67649-78-9Relevant academic research and scientific papers
1-Iodo-1-selenoalkenes as versatile alkene 1,1-dianion equivalents. Novel connective approach towards the tetrahydropyran subunit of polycavernoside A
Pérez-Balado, Carlos,Markó, István E.
, p. 2331 - 2349 (2007/10/03)
syn-Hydroalumination of 2,4,6-triisopropylphenylselanyl-1-alkynes with DIBAL-H followed by Al/I exchange with I2 afforded exclusively (E)-1-iodo-1-selenoalkenes in good yields. 1-Iodo-1-selenopropene 10 proved to be a convenient 1,1 dianion equivalent, leading to the stereodivergent synthesis of allylsilanes (Z)-6 and (E)-6. Adduct 3, an intermediate in the synthesis of the tetrahydropyran subunit of polycavernoside A, was efficiently synthesised from allylsilane (Z)-6 and aldehyde 7 via an intramolecular Sakurai cyclisation.
Stereoselective synthesis of (E)-1-iodo-1-selenoalkenes via hydroalumination-iodination of 1-alkynyl selenides
Pérez-Balado, Carlos,Lucaccioni, Fabio,Markó, István E.
, p. 4883 - 4886 (2007/10/03)
syn-Hydroalumination of 2,4,6-triisopropylphenylselanyl-1-alkynes 22 with DIBAL-H, followed by Al/I exchange with I2, afforded selectively the corresponding (E)-1-iodo-1-selenoalkenes in good yields. The sterically hindered 2,4,6-triisopropylphenyl group proved to be mandatory and prevented the formation of undesired by-products.
Hydroalumination and bromination of 1-(phenylselenyl)- 1-alkynes
Al-Hassan
, p. 3027 - 3030 (2007/10/03)
Hydroaluminuation and bromination of 1-(phenylselenyl)-1-alkynes were studied and compared with the rate of hydroalumination and bromination of the corresponding alkynylsilanes.
Hypervalent iodine in synthesis 44: Stereoselective synthesis of vinylic selenides by the reaction of sodium selenolates with vinyl (phenyl) iodonium salts
Yan, Jie,Chen, Zhen-Chu
, p. 1009 - 1015 (2007/10/03)
Vinylic selenides have been prepared stereoselectively by the reaction of sodium selenolates with vinyl(phenyl)iodonium salts with retention or inversion of the configurations.
Synthesis of ketene butyltelluro(phenylseleno)acetals by the Al/Te exchange reaction
Dabdoub, Miguel J.,Cassol, Tania M.,Barbosa, Sandro L.
, p. 831 - 834 (2007/10/03)
Hydroalumination of acetylenic selenides occurs regiospecifically and the vinyl alanes obtained as intermediates were transformed into ketene butyltelluro (phenylseleno) acetals by the Al/Te exchange reaction using C4H9TeBr as electr
Vicinal di￡unctionalization of alkynyl selenides with lithium butylcyano cuprate and electrophiles
Braga,Reckziegel,Silveira,Comasseto
, p. 1165 - 1170 (2007/10/02)
Alkynyl selenides react with lithium butylcyano cuprate giving an intermediate lithium vinylcyano cuprate, which is trapped with electrophiles to give several classes of vinylic selenides.
STEREOSELECTIVE SYNTHESIS OF VINYLIC SELENIDES
Comasseto, J. V.,Ferreira, J. T. B.,Petragnani, N.
, p. 287 - 294 (2007/10/02)
The addition of selenophenol to mono- and di-substituted unactivated acetylenes have been investigated.At room temperature the vinylic selenides obtained were predominantly of the Z configuration; at 120 deg C Z/E mixtures were produced.Vinylic selenides
