Abstract
AbstractAn efficient method for the selective synthesis of δ‐lactone from CO2 and 1,3‐butadiene was developed by using ultrasmall palladium nanoparticles as a catalyst for the first time. Palladium nanoparticles (1.90±0.39 nm) were generated in situ in the presence of Pd(acac)2, tetrabutylammonium acetate (TBAAc), and PPh3 as the precatalyst, stabilizer, and reductant, respectively. Maximum yield (86 % with 96 % selectivity) with satisfactory conversion (89 %) and turnover number (1271) was achieved under mild conditions.
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