{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T11:57:16Z","timestamp":1791460636902,"version":"4.3.4"},"reference-count":23,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Rospotrebnadzor\u2019s sectoral research program","award":["126030218221-8"],"award-info":[{"award-number":["126030218221-8"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Chemicals are widely used to protect humans from biological threats. Ticks are among the most dangerous biological species, as they transmit dangerous diseases such as Q-fever, Crimean\u2013Congo hemorrhagic fever, tick-borne encephalitis, and others. It is not feasible nor viable to eradicate all tick populations in areas where people spend their leisure time or work. Personal protective equipment in general, and repellents in particular, have therefore become an important means of protection against this biological threat. Previous studies have shown that despite the repellent activity of substances currently used for this purpose, their effective concentrations against the taiga tick are not fit for practical application. In this study, we synthesized a homologous series of alkyl 3-(N-butylacetamido)propanoates with alkyl groups ranging from C1 to C12 and characterized these compounds using nuclear magnetic resonance (NMR) spectroscopy, infrared (IR) spectroscopy, and mass spectrometry. We also investigated the biological activity of all the synthesized compounds against the Ixodes persulcatus ticks. We demonstrated that the methyl, propyl and butyl esters of 3-(N-butylacetamido)propanoate exhibit the highest biological activity with an activity level approximately six times higher than that of the commercially available repellent IR3535\u00ae.<\/jats:p>","DOI":"10.3390\/molecules31193570","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T11:26:53Z","timestamp":1791458813000},"page":"3570","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synthesis, Characterization and Biological Activity of Alkyl 3-(N-Butylacetamido)propanoates Against Ixodid Ticks"],"prefix":"10.3390","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2405-9931","authenticated-orcid":false,"given":"Sergey V.","family":"Andreev","sequence":"first","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ekaterina I.","family":"Anosova","sequence":"additional","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alisa P.","family":"Terskova","sequence":"additional","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Varvara A.","family":"Morenova","sequence":"additional","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evita A.","family":"Kostenko","sequence":"additional","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sergey A.","family":"Zverev","sequence":"additional","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4952-3561","authenticated-orcid":false,"given":"Andrey S.","family":"Kuzovlev","sequence":"additional","affiliation":[{"name":"Disinfectology Institute of F.F. Erisman FSCH of Rospotrebnadzor, 18a Nauchny Proezd, Moscow 117246, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,10,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"254","DOI":"10.1016\/j.azn.2025.05.004","article-title":"A Comprehensive Review of Tick-Borne Disease Epidemiology, Clinical Manifestations, Pathogenesis, and Prevention","volume":"1","author":"Gong","year":"2025","journal-title":"Anim. Zoonoses"},{"key":"ref_2","first-page":"6","article-title":"Epidemiological Situation on Tick-Borne Viral Encephalitis in the Russian Federation over the Period of 2015\u20132024 and Short-Term Incidence Forecast for 2025","volume":"1","author":"Andaev","year":"2025","journal-title":"Probl. Part. Danger. 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