{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T12:43:01Z","timestamp":1774960981644,"version":"3.50.1"},"reference-count":30,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2004,9,1]],"date-time":"2004-09-01T00:00:00Z","timestamp":1093996800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2004,9,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Mucohalogen acids have been used for the preparation of a variety of 3,4-dihalogenated 2(5H)-furanones. In one synthetic step the carbamates 2a-c and the pseudoanhydrides 4a-e were prepared using isocyanates and acid anhydrides. A series of 5-alkoxylated 3,4-dichloro-2(5H)-furanones 5a-o have been synthesized with a wide range of lipophilicity, using the hydroxy-form of mucohalogen acids 1a and 1b. The 5-allyl-3,4-dichloro-2(5H)-furanone 5f was derived into the dihydro-isoxazol 6 and the oxirane 7. The methyl ester 5a was converted with ammonia into the tetramic acid chloride 11. The pseudo acid chloride 3 was reacted further into the bis aziridine 8. Reduction of the mucochloric acid 1a furnished the trichlorofuranone 3. The cytotoxicity of these simple and bis-cyclic butenolides have been evaluated in tissue culture on MAC13 and MAC16 cancer cell lines using the MTT cytotoxicity assay. The ester 5g, the acetate 4b and the carbamate 2b displayed a cytotoxicity in the low micromolar range. Further, an IC50 (50% inhibitory concentration) of 50 nM and 30 nM was determined for the epoxide 7 and the aziridine 8.<\/jats:p>","DOI":"10.1211\/0022357044201","type":"journal-article","created":{"date-parts":[[2004,8,14]],"date-time":"2004-08-14T02:32:47Z","timestamp":1092450767000},"page":"1163-1170","source":"Crossref","is-referenced-by-count":17,"title":["Cytotoxicity of 3,4-dihalogenated 2(5H)-furanones"],"prefix":"10.1093","volume":"56","author":[{"given":"Eric","family":"Lattmann","sequence":"first","affiliation":[{"name":"Aston University, School of Life and Health Sciences, Biomedical Division , Birmingham B4 7ET,","place":["UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Derek","family":"Kinchington","sequence":"additional","affiliation":[{"name":"Department of Virology, St. Bartholomew's Hospital , London ECIA 7 BE,","place":["UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Simon","family":"Dunn","sequence":"additional","affiliation":[{"name":"Aston University, School of Life and Health Sciences, Biomedical Division , Birmingham B4 7ET,","place":["UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Harjit","family":"Singh","sequence":"additional","affiliation":[{"name":"Aston University, School of Life and Health Sciences, Biomedical Division , Birmingham B4 7ET,","place":["UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Washington O","family":"Ayuko","sequence":"additional","affiliation":[{"name":"Aston University, School of Life and Health Sciences, Biomedical Division , Birmingham B4 7ET,","place":["UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael J","family":"Tisdale","sequence":"additional","affiliation":[{"name":"Aston University, School of Life and Health Sciences, Biomedical Division , Birmingham B4 7ET,","place":["UK"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2004,9,1]]},"reference":[{"key":"2024103109404709500_cit1","volume-title":"Butenolide derivatives as anti-cancer agents","author":"Ayuko","year":"1999"},{"key":"2024103109404709500_cit2","first-page":"1123","article-title":"Synthesis of penicillin acid from 1-cysteine","volume":"23","author":"Black","year":"1966","journal-title":"J. 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