{"title":"Mn(I)-配合物催化聚对苯二甲酸酯升级回收制α-羟基羧酸。","authors":"Soham Das Adhikary, Sayan K Jana, Biplab Maji","doi":"10.1002/anie.202513145","DOIUrl":null,"url":null,"abstract":"<p><p>The chemical upcycling of poly(ethylene terephthalate) (PET) waste into value-added products presents a promising strategy to address global plastic pollution. Here, we report a manganese-catalyzed, one-pot approach for tandem PET depolymerization and acceptorless dehydrogenative coupling (ADC) to selectively produce α-hydroxycarboxylic acids (α-HCAs), including glycolic, lactic, and higher-value derivatives, along with terephthalic acid (TPA) and H<sub>2</sub> gas. Employing bench-stable (PNP)Mn(I)-pincer complexes, this cascade process operates under mild conditions (120-140 °C) and accommodates a broad range of primary alcohol coupling partners, enabling the synthesis of valuable biodegradable polymer precursors (glycolic and lactic acid) and higher α-HCAs. Notably, the system exhibits exceptional tolerance to common plastic additives and requires no energy-intensive pretreatment, achieving near-quantitative TPA recovery and significant H<sub>2</sub> evolution. This work demonstrates how base-metal catalysis can bridge plastic waste remediation and sustainable chemical synthesis, offering a practical pathway toward circular polymer economies.</p>","PeriodicalId":520556,"journal":{"name":"Angewandte Chemie (International ed. in English)","volume":" ","pages":"e202513145"},"PeriodicalIF":16.9000,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mn(I)-Complex Catalyzed Upcycling of Polyethylene Terephthalate to α-Hydroxy Carboxylic Acids.\",\"authors\":\"Soham Das Adhikary, Sayan K Jana, Biplab Maji\",\"doi\":\"10.1002/anie.202513145\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The chemical upcycling of poly(ethylene terephthalate) (PET) waste into value-added products presents a promising strategy to address global plastic pollution. Here, we report a manganese-catalyzed, one-pot approach for tandem PET depolymerization and acceptorless dehydrogenative coupling (ADC) to selectively produce α-hydroxycarboxylic acids (α-HCAs), including glycolic, lactic, and higher-value derivatives, along with terephthalic acid (TPA) and H<sub>2</sub> gas. Employing bench-stable (PNP)Mn(I)-pincer complexes, this cascade process operates under mild conditions (120-140 °C) and accommodates a broad range of primary alcohol coupling partners, enabling the synthesis of valuable biodegradable polymer precursors (glycolic and lactic acid) and higher α-HCAs. Notably, the system exhibits exceptional tolerance to common plastic additives and requires no energy-intensive pretreatment, achieving near-quantitative TPA recovery and significant H<sub>2</sub> evolution. This work demonstrates how base-metal catalysis can bridge plastic waste remediation and sustainable chemical synthesis, offering a practical pathway toward circular polymer economies.</p>\",\"PeriodicalId\":520556,\"journal\":{\"name\":\"Angewandte Chemie (International ed. in English)\",\"volume\":\" \",\"pages\":\"e202513145\"},\"PeriodicalIF\":16.9000,\"publicationDate\":\"2025-09-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Angewandte Chemie (International ed. in English)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/anie.202513145\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Angewandte Chemie (International ed. in English)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/anie.202513145","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Mn(I)-Complex Catalyzed Upcycling of Polyethylene Terephthalate to α-Hydroxy Carboxylic Acids.
The chemical upcycling of poly(ethylene terephthalate) (PET) waste into value-added products presents a promising strategy to address global plastic pollution. Here, we report a manganese-catalyzed, one-pot approach for tandem PET depolymerization and acceptorless dehydrogenative coupling (ADC) to selectively produce α-hydroxycarboxylic acids (α-HCAs), including glycolic, lactic, and higher-value derivatives, along with terephthalic acid (TPA) and H2 gas. Employing bench-stable (PNP)Mn(I)-pincer complexes, this cascade process operates under mild conditions (120-140 °C) and accommodates a broad range of primary alcohol coupling partners, enabling the synthesis of valuable biodegradable polymer precursors (glycolic and lactic acid) and higher α-HCAs. Notably, the system exhibits exceptional tolerance to common plastic additives and requires no energy-intensive pretreatment, achieving near-quantitative TPA recovery and significant H2 evolution. This work demonstrates how base-metal catalysis can bridge plastic waste remediation and sustainable chemical synthesis, offering a practical pathway toward circular polymer economies.