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Catalytic Cleavage of C(sp2)–C(sp2) Bonds with Rh-Carbynoids
Author(s) -
Zhaofeng Wang,
Liyin Jiang,
Pau Sarró,
Marcos G. Suero
Publication year - 2019
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.9b08632
Subject(s) - chemistry , carbyne , rhodium , catalysis , diazo , nucleophile , allylic rearrangement , bond cleavage , cleavage (geology) , stereochemistry , ring (chemistry) , medicinal chemistry , photochemistry , organic chemistry , carbene , geotechnical engineering , fracture (geology) , engineering
We report a catalytic strategy that generates rhodium-carbynoids by selective diazo activation of designed carbyne sources. We found that rhodium-carbynoid species provoke C( sp 2 )-C( sp 2 ) bond scission in alkenes by inserting a monovalent carbon unit between both sp 2 -hybridized carbons. This skeletal remodeling process accesses synthetically useful allyl cation intermediates that conduct to valuable allylic building blocks upon nucleophile attack. Our results rely on the formation of cyclopropyl-I (III) intermediates able to undergo electrocyclic ring-opening, following the Woodward-Hoffmann-DePuy rules.

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