Rearrangements of α-Diazo-β-hydroxyketones for the Synthesis of Bicyclo[<i>m</i>.<i>n</i>.1]alkanones
作者:Zhengning Li、Shuk Mei Lam、Ignatius Ip、Wing-tak Wong、Pauline Chiu
DOI:10.1021/acs.orglett.7b01963
日期:2017.9.1
Rhodium-catalyzed decomposition of fused bicyclic α-diazo-β-hydroxyketones results in good yields of bridged bicyclo[m.n.1]ketones via a rearrangement pathway.
Photoinducedelectrontransfer (PET) promoted decarboxylation of α-(ω-carboxyalkyl) β-keto esters undergoes radical ringexpansion and cyclization reactions. This mild and environmentally friendly method can provide one-carbon expanded γ-keto esters and bicyclic alcohols, and the product distribution is strongly dependent on the length of the alkyl chain containing the terminal carboxylate group.
Palladium‐Based Dyotropic Rearrangement Enables A Triple Functionalization of <i>Gem</i>‐Disubstituted Alkenes: An Unusual Fluorolactonization Reaction
作者:Qiang Feng、Chen‐Xu Liu、Qian Wang、Jieping Zhu
DOI:10.1002/anie.202316393
日期:2024.1.2
4-methylenealkanoic acid derivatives with Selectfluor provides fluorolactones via a sequence of 5-exo-trig oxypalladation, Pd oxidation, regioselective ring-enlarging 1,2-alkyl/Pd(IV) dyotropic rearrangement and C−F bond-forming reductive elimination.