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Donor\u2013acceptor cyclopropenes formed from the geometrical isomers of the \u03b3\u2010substituted enol diazoacetates underwent catalytic ring opening to give only the <jats:italic>Z<\/jats:italic>\u2005isomer of the metalloenolcarbene intermediate, provided excellent yields and selectivities for the 1,5\u2010diazabicyclo[<jats:italic>n<\/jats:italic>.3.1]non\u20102\u2010ene derivatives.<\/jats:p>","DOI":"10.1002\/anie.201906754","type":"journal-article","created":{"date-parts":[[2019,7,19]],"date-time":"2019-07-19T15:10:11Z","timestamp":1563549011000},"page":"12502-12506","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":47,"title":["Catalytic Desymmetric Cycloaddition of Diaziridines with Metalloenolcarbenes: The Role of Donor\u2013Acceptor Cyclopropenes"],"prefix":"10.1002","volume":"58","author":[{"given":"Haifeng","family":"Zheng","sequence":"first","affiliation":[{"name":"Department of Chemistry The University of Texas at San Antonio  One UTSA Circle San Antonio TX 78249 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1386-3780","authenticated-orcid":false,"given":"Michael P.","family":"Doyle","sequence":"additional","affiliation":[{"name":"Department of Chemistry The University of Texas at San Antonio  One UTSA Circle San Antonio TX 78249 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,8,7]]},"reference":[{"key":"e_1_2_2_1_1","unstructured":"\u00a0"},{"key":"e_1_2_2_2_2","volume-title":"Modern Catalytic Methods for Organic Synthesis with Diazo Compounds: From Cyclopropanes to Ylides","author":"Doyle M. 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