Synthesis of Cross-Conjugated Polyenes via Palladium-Catalyzed Oxidative C-C Bond Forming Cascade Reactions of Allenes
An efficient palladium-catalyzed oxidative C-C bond forming cascade reaction of allenes involving a coupling between an enallene and an allenyne followed by a carbocyclization of the generated Pd-intermediate was developed. This cascade reaction afforded functionalized cross-conjugated polyenes. The enallene is initially activated by palladium and reacts with the allenyne to give the cross-conjugated polyenes.
B?ckvall, Jan-E.,Naidu, Veluru Ramesh
supporting information
p. 5428 - 5437
(2020/05/19)
Direct Determination of the Enantiomeric Purity of Chiral Trisubstituted Allenes by Using Permethylated Cyclodextrin as a Chiral Solvating Agent
The heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin (TRIMEB) has been successfully used as convenient chiral solvating agent to determine the enantiomeric composition of chiral trisubstituted allenes by 1H NMR spectroscopy: the analysis of the effect of the molar ration TRIMEB/allene, temperature, and nature of the solvent allowed us to optimize the experimental conditions to enhance the separation between the signals of the two enantiomers of each allene.
Uccello-Barretta, Gloria,Balzano, Federica,Caporusso, Anna Maria,Salvadori, Piero
p. 836 - 839
(2007/10/02)
THE STEREOCHEMISTRY OF OPTICALLY ACTIVE 3,3-DIALKYL-1-BROMOALLENES
The absolute R configuration has been assigned to the dextrorotatory 1-bromo-3,4,4-trimethyl-1,2-pentadiene by relation to compounds of known configuration; this result has been used to clarify the stereochemistry of the conversion of tertiary propargylic alcohols into bromoallenes by HBr-CuBr.
Caporusso, Anna Maria,Zoppi, Alessandra,Settimo, Federico Da,Lardicci, Luciano
p. 293 - 296
(2007/10/02)
More Articles about upstream products of 10575-72-1