Cu(0)/Selectfluor System-Mediated Mild Synthesis of Fluorinated Fluorenones from Nonaromatic Precursors (1,6-Enynes) Involving C–C Single Bond Cleavage
作者:Jian Zhang、Heng Wang、Shaobo Ren、Wei Zhang、Yunkui Liu
DOI:10.1021/acs.orglett.5b01110
日期:2015.6.19
A novel and facile method for the mild construction of fluorinated fluorenones from nonaromatic precursors (1,6-enynes) mediated by a Cu(0)/Selectfluor system has been successfully achieved. Preliminary mechanistic investigations indicate that the reaction may proceed via an unprecedented annulation/C–C single bondcleavage/fluorination sequence.
Palladium-catalyzed <i>ortho</i>-halogen-induced deoxygenative approach of alkyl aryl ketones to 2-vinylbenzoic acids
作者:Shankar Ram、Ajay Kumar Sharma、Arvind Singh Chauhan、Pralay Das
DOI:10.1039/d0cc02941f
日期:——
polymer chemistry and are key precursors for the synthesis of important bioactive molecules. Herein, an ortho-halogen-induced deoxygenative approach for the generation of 2-vinylbenzoic acids from alkylarylketones by palladium catalysis is discovered and explored. This approach requires no base or stoichiometric additives and can be carried out through a simple one-step process. Furthermore, the present
The present invention relates to novel aryl isoxazoline derivatives having excellent insecticidal activity as insecticides and represented by the formula:
and their use as insecticides and acarizides.
Molybdenum(0)-Promoted Carbonylative Cyclization of<i>o</i>-Haloaryl- and β-Haloalkenylimine Derivatives by Oxidative Addition of a Carbon(sp<sup>2</sup>)Halogen Bond: Preparation of Two Types of γ-Lactams
作者:Jun Takaya、Kenichiro Sangu、Nobuharu Iwasawa
DOI:10.1002/anie.200902884
日期:2009.9.7
Lovely lactams: Synthetically useful γ‐lactam derivatives have been prepared through the unique title transformation. By utilizing the characteristic property of the molybdenum complex, two kinds of products (both of which have rarely been obtained by reactions catalyzed by late transition metals) were obtained selectively by adjusting the reaction conditions (see scheme).
smoothly with various acid chlorides at 40 °C in the presence of 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone (DMPU) as a cosolvent and 30 mol% each of copper(I) bromide (CuBr) and 1,10-phenanthroline, affording the corresponding tetrafluoroethylenated ketones in high yield. However, in the cross-coupling reaction with iodoarenes, only reactions with iodoarenes having a directing group at the ortho