{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Walters ZG"],"funding":["Division of Chemistry","National Center for Research Resources","NCRR NIH HHS","National Institute of General Medical Sciences","NIGMS NIH HHS","National Science Foundation"],"pagination":["16047-16056"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12337000"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["16(35)"],"pubmed_abstract":["First disclosed in 1983, the Kobayashi method for generating transient strained intermediates from 1,2-silyltriflate precursors has become an indispensable tool in organic synthesis. More than 1300 Kobayashi precursors to strained intermediates have been reported to date, leading to the use of these precursors in more than 17 000 strained intermediate trapping reactions. Surprisingly, the mechanism of the Kobayashi elimination to form strained intermediates has been studied only for the formation of benzyne. We report computational studies that determine the timing of Si-C and C-O cleavage, as well as the thermodynamics of strained intermediate formation. The calculated pathway for generating anti-Bredt olefins from Kobayashi precursors differs compared to the mechanism for strained interm"],"journal":["Chemical science"],"pubmed_title":["Mechanisms of Kobayashi eliminations for the generation of highly strained arynes, cyclic cumulenes, and anti-Bredt olefins."],"pmcid":["PMC12337000"],"funding_grant_id":["CHE-1048804","S10RR025631","R35 GM139593","CHE-2153972","S10 RR025631","OCI-1053575"],"pubmed_authors":["Walters ZG","Witkowski DC","Garg NK","Houk KN"],"additional_accession":[]},"is_claimable":false,"name":"Mechanisms of Kobayashi eliminations for the generation of highly strained arynes, cyclic cumulenes, and anti-Bredt olefins.","description":"First disclosed in 1983, the Kobayashi method for generating transient strained intermediates from 1,2-silyltriflate precursors has become an indispensable tool in organic synthesis. More than 1300 Kobayashi precursors to strained intermediates have been reported to date, leading to the use of these precursors in more than 17 000 strained intermediate trapping reactions. Surprisingly, the mechanism of the Kobayashi elimination to form strained intermediates has been studied only for the formation of benzyne. We report computational studies that determine the timing of Si-C and C-O cleavage, as well as the thermodynamics of strained intermediate formation. The calculated pathway for generating anti-Bredt olefins from Kobayashi precursors differs compared to the mechanism for strained interm","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Sep","modification":"2026-06-03T06:04:25.789Z","creation":"2026-05-29T03:05:54.602Z"},"accession":"S-EPMC12337000","cross_references":{"pubmed":["40800055"],"doi":["10.1039/d5sc03943f"]}}