A gel-entrapped base has been fabricated by using agarose (biopolymer), and tested in the Suzuki-Miyaura cross-coupling reaction in 95% ethanol. The developed environmentally benign polymer-supported base has low leaching and high stability for the Suzuki-Miyaura cross-coupling reaction to give high yield with green credit. (C) 2013 Published by Elsevier Masson SAS on behalf of Academie des sciences.