{"doi":"10.1246/cl.1974.1237","title":"A NEW SYNTHETIC METHOD FOR β-SUBSTITUTED Δα,β-BUTENOLIDES","abstract":"<jats:title>Abstract</jats:title>\n               <jats:p>α-Phenylsulfinyllactones 2 underwent the Pummerer rearrangement and subsequent elimination of acetic acid by treating with hot acetic anhydride to give α-phenylthiobutenolides 4. Conjugate addition reaction of 4 with organocopper reagents or malonic ester followed by oxidation to sulfoxides and pyrolysis afforded β-monosubstituted or β,γ-disubstituted butenolides 6 in moderate overall yields.</jats:p>","journal":"Chemistry Letters","year":1974,"id":41764,"datarank":1.509515556146762,"base_score":2.5649493574615367,"endowment":2.5649493574615367,"self_citation_contribution":0.38474240361923057,"citation_network_contribution":1.1247731525275313,"self_endowment_contribution":0.38474240361923057,"citer_contribution":1.1247731525275313,"corpus_percentile":null,"corpus_rank":null,"citation_count":12,"citer_count":11,"citers_with_citation_signal":11,"citers_with_endowment":11,"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":197840,"name":"Hiroshi Kosugi","orcid":null,"position":1,"is_corresponding":false},{"id":197841,"name":"Hisashi Uda","orcid":null,"position":2,"is_corresponding":false},{"id":200761,"name":"Kiyoshi Iwai","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":2.5649493574615367,"endowment":2.5649493574615367,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"18998881","pmcid":null,"openalex_id":"https://openalex.org/W2525439931","authors":[],"funders":[],"total_grants":0,"fwci":1.0565,"citation_percentile":0.74673367,"influential_citations":0,"citation_trend":[{"year":2021,"count":1}],"oa_status":"closed","license":"https://academic.oup.com/pages/standard-publication-reuse-rights","oa_locations":[{"url":"https://academic.oup.com/chemlett/article-pdf/3/10/1237/56155225/cl.1974.1237.pdf","host_type":"publisher"},{"url":"https://doi.org/10.1246/cl.1974.1237","host_type":"journal"}],"fields_of_study":["Organic and Inorganic Chemical Reactions","Chemical Synthesis and Reactions","Sulfur-Based Synthesis Techniques","Chemistry"],"mesh_terms":[],"keywords":["Chemistry","Acetic anhydride","Pummerer rearrangement","Reagent","Acetic acid","Malonic acid","Conjugate","Organic chemistry","Pyrolysis","Medicinal chemistry","Catalysis"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Clean water and sanitation"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-13T06:09:11.845032Z","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":[]}