Ring opening of cyclopropylketones induced by photochemical electron transfer
作者:Janine Cossy、Nathalie Furet、Samir BouzBouz
DOI:10.1016/0040-4020(95)00727-p
日期:1995.10
Depending on the substitution pattern of cyclopropylketones, the photochemically induced electron transfer of tertiary amines to cyclopropylketones leads either to the formation of 3-substituted cycloalkanones or to ring expanded products.
根据环丙基酮的取代方式,光化学诱导的叔胺电子转移至环丙基酮会导致3-取代的环烷酮的形成或环扩产物。
Photochemical ring opening of cyclopropyl ketones induced by electron transfer
作者:Janine Cossy、Nathalie Furet
DOI:10.1016/s0040-4039(00)61464-8
日期:1993.12
Irradiation of substituted bicyclo[n.1.0]alkan-2-ones at 254 nm in the presence of triethylamine and lithium perchlorate (LiClO4) can lead to cyclopropane ring opening with cleavage of the C(1)-C(n+2) (ring enlargement) or C(1)-C(n+3) bonds.
Another Role of Copper in the Simmons–Smith Reaction: Copper-catalyzed Nucleophilic Michael-type Cyclopropanation of α,β-Unsaturated Ketones
作者:Kanami Fujii、Tomonori Misaki、Takashi Sugimura
DOI:10.1246/cl.131193
日期:2014.5.5
Cyclopropanation was performed using the Furukawa procedure with CH2I2/Et2Zn and α,β-unsaturated ketones. The reaction was performed in the presence of a copper salt. The reactivity was highly depe...
The chromium trioxide–3,5-dimethylpyrazole complex: a mild and selective reagent for the oxidation of cyclopropyl hydrocarbons
作者:Martin G. Banwell、Najiba Haddad、Julie A. Huglin、Maureen F. MacKay、Monica E. Reum、John H. Ryan、Kathleen A. Turner (née Herbert)
DOI:10.1039/c39930000954
日期:——
The title complex selectively oxidises the methylene unit adjacent to a cyclopropane ring producing synthetically useful yields of the corresponding cyclopropyl ketones and/or products resulting from cleavage of the three-membered ring.
Nucleophilic Carbenes Derived from Dichloromethane
作者:Mingxin Liu、Nguyen Le、Christopher Uyeda
DOI:10.1002/anie.202308913
日期:2023.10.16
Nickel catalysts promote cyclopropanation reactions of electron-deficient alkenesusing dichloromethane as a methylene source. An asymmetric variant using a chiral pyridine-bis(oxazoline) ligand provides access to pharmaceutically relevant 2-aryl cyclopropyl carboxylates in highly enantioenriched form. The proposed mechanism involves the formation of a nucleophilic nickel carbene that reacts by a