{"doi":"10.1002/cmdc.202400378","title":"Carbon‐13 Hyperpolarization of α‐Ketocarboxylates with Parahydrogen in Reversible Exchange","abstract":"Abstract Signal Amplification by Reversible Exchange (SABRE) is a relatively simple and fast hyperpolarization technique that has been used to hyperpolarize the α‐ketocarboxylate pyruvate, a central metabolite and the leading hyperpolarized MRI contrast agent. In this work, we show that SABRE can readily be extended to hyperpolarize 13 C nuclei at natural abundance on many other α‐ketocarboxylates. Hyperpolarization is observed and optimized on pyruvate (P 13C =17 %) and 2‐oxobutyrate (P 13C =25 %) with alkyl chains in the R‐group, oxaloacetate (P 13C =11 %) and alpha‐ketoglutarate (P 13C =13 %) with carboxylate moieties in the R group, and phenylpyruvate (P 13C =2 %) and phenylglyoxylate (P 13C =2 %) with phenyl rings in the R‐group. New catalytically active SABRE binding motifs of the substrates to the hyperpolarization transfer catalyst – particularly for oxaloacetate – are observed. We experimentally explore the connection between temperature and exchange rates for all of these SABRE systems and develop a theoretical kinetic model, which is used to fit the hyperpolarization build‐up and decay during SABRE activity.","journal":"ChemMedChem","year":2024,"id":441257,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":9,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9503,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2024-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1028164,"name":"Keilian MacCulloch","orcid":"0000-0002-4506-5057","position":1,"is_corresponding":false},{"id":493497,"name":"Patrick TomHon","orcid":"0000-0003-3202-9812","position":2,"is_corresponding":false},{"id":1028165,"name":"Austin Browning","orcid":"0000-0001-9190-1215","position":3,"is_corresponding":false},{"id":1254334,"name":"Samantha Meisel","orcid":null,"position":4,"is_corresponding":false},{"id":1028168,"name":"Mustapha Abdulmojeed","orcid":"0000-0002-5513-3658","position":5,"is_corresponding":false},{"id":402030,"name":"Boyd M. Goodson","orcid":"0000-0001-6079-5077","position":6,"is_corresponding":false},{"id":402028,"name":"Eduard Y. Chekmenev","orcid":"0000-0002-8745-8801","position":7,"is_corresponding":false},{"id":477788,"name":"Thomas Theis","orcid":"0000-0001-6779-9978","position":8,"is_corresponding":false},{"id":1028167,"name":"Stephen McBride","orcid":"0000-0001-9144-1423","position":0,"is_corresponding":true}],"reference_count":73,"raw_metadata":null,"created_at":"2026-07-19T02:01:06.281460Z","pmid":"39363703","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}