Efficiency of ionicliquidsupportedorganotinreagents in Stillecross-couplingreactions involving aryl bromides has been investigated. In a general manner, products were isolated with good yields by using a very simple catalytic system without the need of solvent, ligand, or additives. The organotin compounds were recycled without loss of activity and the contamination by tin was limited and controlled
The synthesis and reactions of 4-(2- and 3-thienyl)-tetrahydroisoquinolines
作者:David E. Tupper、Terrence M. Hotten、William G. Prowse
DOI:10.1002/jhet.5570330420
日期:1996.7
derivatives substituted in the 4-position by either a 2- or 3-substitutedthiophene ring have been synthesised. Simple electrophilic substitutionreactions of these systems take place as expected in the α-position of the thiophene ring. Metalation reactions are more complex and take place at the benzylic 4-position of the tetrahydroisoquinoline nucleus in the case of the 2-substituted thiophene derivatives
STUDIES OF (Pd<sup>O</sup>-MEDIATED) STILLE CROSS-COUPLING REACTIONS OF THIOPHENESTANNANE WITH ARYL HALIDE DERIVATIVES
作者:Abdel-Sattar S. Hamad Elgazwy
DOI:10.1080/10426500008045239
日期:2000.1
Stille (arylstannane) conditions used Pd-0-mediated cross-coupling reactions for preparation of thiophene/aryl analogs. Different arylhalides were compared when coupled with heterometal (thiophenestannane) system. Comparable yields have now been obtained by Stille (arylstannane) couplings with different reactivity of arylhalides.