The Carbon2Polymer project involves a multistep reaction sequence for the non‐phosgene synthesis of the high‐value polymer precursor toluene‐2,4‐diisocyanate (TDI) starting from carbon dioxide. The present study of the oxidative carbonylation revealed that for the intermediate toluene‐2,4‐dicarbamate (TDC) the productivity is highest with Pd@ZrO₂, followed by Pd@CeO₂. As one of the side products which are formed in parallel and consecutive reactions the methylene‐bridged dimer “TDCCH2TDC” (5) has a promising potential for industrial application.

中文翻译：

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Carbon2Polymer：通过TDA与甲基甲酸酯的氧化羰基化制得聚氨酯的基于CO2的路线

Carbon2Polymer项目涉及从二氧化碳开始的非光气合成高价值聚合物前体甲苯-2,4-二异氰酸酯（TDI）的多步骤反应序列。目前对氧化羰基化的研究表明，对于中间甲苯-2,4-二氨基甲酸酯（TDC），Pd @ ZrO ₂生产率最高，其次是Pd @ CeO ₂。作为平行和连续反应形成的副产物之一，亚甲基桥二聚体“ TDCCH2TDC”（5）具有工业应用的潜力。