[en] We developed a shortened synthetic route for a highly active catalyst for CO₂/PO copolymerization. This route allows the scaleable synthesis of the potential catalyst, which will encourage the commercialization of these CO₂/PO copolymers. The carbon dioxide/propylene oxide (CO₂/PO) copolymer is attractive in many aspects and so has attracted much interest. The copolymer, which consists of alternating CO₂ and PO subunits, has 44% by weight CO₂. The CO₂ gas is abundant and cheap, making the copolymer economical to prepare. The copolymer burns gently in air without emission of toxic materials, decomposes at a relatively low temperature of approximately 250 .deg. C without an ash residue, and adheres strongly to a cellulosic substrate. These merits have been blunted by the lack of commercial quantities of the polymer due to the absence of a satisfactory catalytic system. We recently reported a highly active catalyst that has the potential to be applied in a commercial process. A key to the catalyst is the binding of two components-Salen-cobalt(III) unit and quaternary ammonium salt-in proximity regardless of either low catalyst concentration or high polymerization temperature, which consequently allows a high turnover number (TON) and a high molecular weight (M_n) of the resulting polymer