{"doi":"10.1002/mrc.1240","title":"Unequivocal total assignment of <sup>13</sup>C and <sup>1</sup>H NMR spectra of some pyrido[1,2‐<i>a</i>]pyrimidine derivatives by 2D‐NMR","abstract":"<jats:title>Abstract</jats:title><jats:p>We report the total assignments of the <jats:sup>13</jats:sup>C and <jats:sup>1</jats:sup>H NMR spectra of some 4‐methyl‐2‐oxo‐(2<jats:italic>H</jats:italic>)‐pyrido[1,2‐<jats:italic>a</jats:italic>]pyrimidine and 2‐methyl‐4‐oxo‐(4<jats:italic>H</jats:italic>)‐pyrido[1,2‐<jats:italic>a</jats:italic>]pyrimidine derivatives. The products were characterized by <jats:sup>1</jats:sup>H and <jats:sup>13</jats:sup>C NMR and reported data for similar compounds. No comparative data for the two sets of isomeric compounds with respect to <jats:sup>13</jats:sup>C and <jats:sup>1</jats:sup>H NMR have been reported to date. We made some detailed studies of the 2D NMR spectra of these compounds and observed that assignments made for non‐protonated carbon atoms by us and those reported in the literature for similar compounds need correction. The revised assignments were made on the basis of heteronuclear single quantum correlation (HSQC) and heteronuclear multiple bond correlation (HMBC) techniques. Copyright © 2003 John Wiley &amp; Sons, Ltd.</jats:p>","journal":"Magnetic Resonance in Chemistry","year":2003,"id":626806,"datarank":0.20794415416798362,"base_score":1.3862943611198906,"endowment":1.3862943611198906,"self_citation_contribution":0.20794415416798362,"citation_network_contribution":0.0,"self_endowment_contribution":0.20794415416798362,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":3,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1621583,"name":"Om P. Suri","orcid":null,"position":1,"is_corresponding":false},{"id":1621585,"name":"Musarat Amina","orcid":null,"position":2,"is_corresponding":false},{"id":1621587,"name":"Basant P. Wakhloo","orcid":null,"position":3,"is_corresponding":false},{"id":1621590,"name":"Naresh K. Satti","orcid":null,"position":4,"is_corresponding":false},{"id":1621580,"name":"Krishan A. 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We made some detailed studies of the 2D NMR spectra of these compounds and observed that assignments made for non‐protonated carbon atoms by us and those reported in the literature for similar compounds need correction. The revised assignments were made on the basis of heteronuclear single quantum correlation (HSQC) and heteronuclear multiple bond correlation (HMBC) techniques. Copyright © 2003 John Wiley &amp; Sons, Ltd.</jats:p>","is_dataset_classified":null,"base_score":1.3862943611198906,"endowment":1.3862943611198906,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"19767382","pmcid":null,"openalex_id":"https://openalex.org/W2130658762","authors":[],"funders":[],"total_grants":0,"fwci":0.0,"citation_percentile":0.13321267,"influential_citations":0,"citation_trend":[{"year":2012,"count":1},{"year":2014,"count":1}],"oa_status":"closed","license":"http://onlinelibrary.wiley.com/termsAndConditions#vor","oa_locations":[{"url":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fmrc.1240","host_type":"publisher"},{"url":"https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/pdf/10.1002/mrc.1240","host_type":"publisher"},{"url":"https://doi.org/10.1002/mrc.1240","host_type":"journal"}],"fields_of_study":["Synthesis and Reactivity of Heterocycles","Synthesis and biological activity","Phenothiazines and Benzothiazines Synthesis and Activities"],"mesh_terms":[],"keywords":["Chemistry","Heteronuclear molecule","Heteronuclear single quantum coherence spectroscopy","Pyrimidine","Carbon-13 NMR satellite","NMR spectra database","Protonation","Carbon-13 NMR","Two-dimensional nuclear magnetic resonance spectroscopy","Spectral line","Stereochemistry","Nuclear magnetic resonance spectroscopy","Proton NMR","Fluorine-19 NMR","Computational chemistry","Organic chemistry"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-04T15:17:16.310340Z","pmid":null,"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":[]}