Nickel-Catalyzed Regioselective Reductive Ring Opening of Aryl Cyclopropyl Ketones with Alkyl Bromides
作者:Bing Yuan、Decai Ding、Chuan Wang
DOI:10.1021/acscatal.2c00677
日期:2022.4.15
Herein, we report the successful implementation of reductive strategy in the ring opening reaction of aryl cyclopropyl ketones with unactivated alkyl bromides. Under the catalysis of nickel, this reductive Csp3–Csp3 cross-coupling reaction proceeds with complete regioselectivity and bypasses the use of pregenerated organometallics, enabling efficient synthesis of alkylated ketones with high step economy
?-Cyclopropylalkyl cations of a spiro[2.4] heptane system
作者:S. A. Osadchii、V. I. Mamatyuk、V. G. Shubin、A. C. Razus、E. Bartha、Zs. Arvay
DOI:10.1007/bf00700173
日期:1994.12
Abstractα-Cyclopropylalkyl cations of a spiro[2.4]heptane system, which are possible intermediates in solvolytic reactions of the corresponding cyclopropylalkanol derivatives, have been generated from compounds of the spiro(indan-2,1′-cyclopropane), spiro(indan-1,1′-cyclo-propane), and spiro[acenaphthylene-1(2H),1′-cyclopropane] classes under “long life” conditions (HSOin3}F-SOin2}FCl-CDin2}Clin2}
Iron-Catalyzed Reductive Ring Opening/<i>gem</i>-Difluoroallylation of Cyclopropyl Ketones
作者:Bing Yuan、Chang Zhang、Haiyan Dong、Chuan Wang
DOI:10.1021/acs.orglett.3c00398
日期:2023.3.24
By merging C–C and C–F bond cleavage, we developed a regioselective ring opening/gem-difluoroallylation of cyclopropyl ketones with α-trifluoromethylstyrenes, which proceeds under the catalysis of iron with the combination of manganese and TMSCl as the reducing agents, providing a new entry to the synthesis of carbonyl-containing gem-difluoroalkenes. Remarkably, the ketyl radical-induced selective