We present an efficient and simple, metal-free and solvent-free silica gel-promoted synthesis of functionalized conjugated dienes by sequential aza-Michael/Michael reactions starting from commercially available primary amines and propiolic esters. The scope and usefulness of the method is demonstrated on 31 examples, including a range of propiolic esters, aliphatic amines and differently substituted aromatic amines. In the case of aliphatic amines, the products are obtanied within 0.5-4 h in 52-85% yield compared with 3.5-22 h under classical solution-phase synthesis, proceeding in similar or lower yields. Particular usefulness of the method is found in the case of weakly nucleophilic aromatic amines, which provide products in 21-73% yield during 2.5-9.5 h compared with 0-49% during 1-6 days under standard solution-phase conditions and in the case of more hydrophobic esters yielding products in 47-79% during 1-3 h compared with 0-45% during 4-114 h in the solvent.