Diastereoselective Remote CH Activation by Hydroboration
作者:Jesús A. Varela、Diego Peña、Bernd Goldfuss、Dmitri Denisenko、Jiri Kulhanek、Kurt Polborn、Paul Knochel
DOI:10.1002/chem.200400023
日期:2004.9.6
thermolysis allows remote diastereoselective C-Hactivation of neighboring aryl rings. Tetrasubstituted and trisubstituted 1,1-diphenylethylene derivatives undergo a highlystereoselective 1,2-rearrangement followed by remoteC-Hactivation to lead, after oxidative workup, to a diol in which the relative stereochemistry of two stereocenters has been controlled. The mechanism of this remoteactivation has been
Tellurium-zinc exchange reaction. A new preparative method of alkenylzinc reagents
作者:Jun Terao、Nobuaki Kambe、Noboru Sonoda
DOI:10.1016/0040-4039(96)00955-0
日期:1996.7
Alkenyl tellurides were converted to the corresponding alkenylzinc compounds by the reaction with diethylzinc. The exchange reaction proceeds efficiently in THF at room temperature with retention of the stereochemistry of the starting tellurides. The successive reaction of the formed alkenylzinc with 4-iodotoluene in the presence of Pd(PPh3)4 afforded a cross-coupling product as a single stereoisomer