Photochemistry of some deoxybenzoins in micellar solutions. Cage effects, isotope effects, and magnetic field effects
作者:Nicholas J. Turro、Jochen Mattay
DOI:10.1021/ja00404a037
日期:1981.7
investigated. It was found that the extent of cage disproprotionation to yield benzaldehydes 6 and ..cap alpha..-methylstyrenes 7 is enhanced by a factor of about 10 compared to the photolyses in homogeneous organic solvents. The advantage of using micelles rather than homogeneous solutions to enhance the magnitude of magnetic isotope and magnetic field effects on cage disproportionation is demonstrated. The
On the Mechanism of Allylic Amination Catalyzed by Iron Salts
作者:Radhey S. Srivastava、Kenneth M. Nicholas
DOI:10.1021/ja964006t
日期:1997.4.1
high regioselectivity resulting from double-bond transposition. The iron-catalyzed reaction of phenylhydroxylamine with representative alkenes in the presence of 2,3-dimethylbutadiene, an effective PhNO trap, produces allyl amines exclusively, excluding the intermediacy of free PhNO in the amination reaction. The reaction of FeCl2,3 with PhNO or PhNHOH produces a novel azo dioxide iron complex, Fe
Iodine(III)-Mediated Intermolecular Allylic Amination under Metal-Free Conditions
作者:José A. Souto、Debora Zian、Kilian Muñiz
DOI:10.1021/ja3013193
日期:2012.5.2
A new approach to direct intermolecular allylic amination has been developed using metal-free conditions at roomtemperature. The reaction employs a hypervalent iodine(III) reagent as an oxidant and bistosylimide as a nitrogen source. A series of different allylic aminations are presented with up to a 99% yield. Mechanistic studies including isotope labeling and Hammett correlation suggest that depending
The first example of diastereo- and enantioselective aza-MBH-type reaction was accomplished by the asymmetric synthesis of β-nitro-γ-enamines via a (1R,2R)-diaminocyclohexane thiourea derivative mediated tandem Michael addition and aza-Henry reaction in good yields (up to 95%) and high enantioselectivities (up to 91% ee) and diastereoselectivities (up to 1:99 dr).