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Herein, the most recent\ndevelopments on the [3+2] cycloaddition reactions using allenes acting either as dipolarophiles\nor 1,3-dipole precursors, are highlighted. The recent contributions on the\nphosphine- and transition metal-catalyzed [3+2] annulations involving allenes as substrates\nare also covered, with the exception of those in which the formation of a 1,3-dipole\n(or synthetic equivalent) is not invoked.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title\/>\n<jats:p>This review summarizes the most relevant research in which allenes are used as building\nblocks for the construction of structurally diverse five-membered rings via [3+2] annulation\nreactions.<\/jats:p>\n<\/jats:sec>","DOI":"10.2174\/1385272823666191203122959","type":"journal-article","created":{"date-parts":[[2019,12,4]],"date-time":"2019-12-04T13:37:43Z","timestamp":1575466663000},"page":"3064-3134","update-policy":"https:\/\/doi.org\/10.2174\/bsp_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["1,3-Dipolar Cycloadditions Involving Allenes: Synthesis of Five-Membered Rings"],"prefix":"10.2174","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0551-7255","authenticated-orcid":true,"given":"Ana L.","family":"Cardoso","sequence":"first","affiliation":[{"name":"CQC and Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8860-0470","authenticated-orcid":true,"given":"Maria I.L.","family":"Soares","sequence":"additional","affiliation":[{"name":"CQC and Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal"}]}],"member":"965","reference":[{"key":"ref=1","doi-asserted-by":"publisher","first-page":"193","DOI":"10.1021\/cr60075a001","volume":"23","author":"Smith L.I.","year":"1938","unstructured":"Smith L.I.; Aliphatic diazo compounds, nitrones, and structurally analogous compounds - Systems capable of undergoing 1, 3-additions. 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