A practical and efficient protocol has been developed to realize the catalytic rearrangement of allyl but-3-enoate to heptadienoic acids in NaHCO3 saturated water, in the presence of catalysts. This method offers a promising approach for the synthesis of complex molecules in aqueous media, reducing the need for organic solvents and minimizing environmental impact. The protocol is straightforward and can be easily scaled up for industrial applications. The results demonstrate the potential of catalysis in water for the synthesis of complex molecules, paving the way for the development of more sustainable and environmentally friendly chemical processes.