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Enolizable carbon pronucleophiles can be used as the coupling partner directly without prior preactivation, presumably owing to in situ CH deprotonation promoted by the allegedly formed zwitterionic intermediate. \u03b1-Amino acid esters and derived di- and tripeptides also accommodated well as N-centered nucleophiles in the coupling with 1 without suffering detectable isomerization, thus providing a new stereospecific entry to ferrocene-peptide conjugates.<\/jats:p>","DOI":"10.1021\/acs.joc.6c01590","type":"journal-article","created":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T02:54:07Z","timestamp":1788404047000},"page":"12377-12388","source":"Crossref","is-referenced-by-count":0,"title":["Ethyl Propiolate-Promoted\nDeaminative Coupling of\nFerrocenylmethanamines with Carbon- and Heteronucleophiles: Stereospecific\nAccess to Ferrocene-Peptide Conjugates"],"prefix":"10.1021","volume":"91","author":[{"given":"Laura","family":"Azcune","sequence":"first","affiliation":[{"name":"University of the Basque Country UPV\/EHU , , ,","place":["Donostia\/San Sebastia\u0301n, Spain, 20018"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-0888-4733","authenticated-orcid":true,"given":"Anje","family":"Mujika","sequence":"additional","affiliation":[{"name":"University of the Basque Country UPV\/EHU , , ,","place":["Donostia\/San Sebastia\u0301n, Spain, 20018"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8574-8568","authenticated-orcid":true,"given":"Aitor","family":"Landa","sequence":"additional","affiliation":[{"name":"University of the Basque Country UPV\/EHU , , ,","place":["Donostia\/San Sebastia\u0301n, Spain, 20018"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0362-0136","authenticated-orcid":true,"given":"Mikel","family":"Oiarbide","sequence":"additional","affiliation":[{"name":"University of the Basque Country UPV\/EHU , , ,","place":["Donostia\/San Sebastia\u0301n, Spain, 20018"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,8,31]]},"reference":[{"key":"2026091109110473300_cit1a","volume-title":"Ferrocenes:\nHomogeneous catalysis, organic synthesis, material\nsciences","author":"Togni","year":"1995"},{"key":"2026091109110473300_cit1b","doi-asserted-by":"crossref","DOI":"10.1002\/9780470985663","volume-title":"Ferrocenes: Ligands, Materials and Biomolecules","author":"Stenicka","year":"2008"},{"key":"2026091109110473300_cit1c","doi-asserted-by":"publisher","first-page":"8085","DOI":"10.1039\/D2DT00903J","article-title":"Forever young:\nthe first seventy years of ferrocene","volume":"51","author":"S\u030cte\u030cpnic\u030cka","year":"2022","journal-title":"Dalton\nTrans."},{"key":"2026091109110473300_cit2a","doi-asserted-by":"publisher","first-page":"6","DOI":"10.1002\/ejic.201600983","article-title":"Why is Ferrocene\nso Exceptional?","volume":"2017","author":"Astruc","year":"2017","journal-title":"Eur. 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