Imido Transfer from Bis(imido)ruthenium(VI) Porphyrins to Hydrocarbons: Effect of Imido Substituents, C−H Bond Dissociation Energies, and Ru<sup>VI/V</sup> Reduction Potentials
(BDE) of the hydrocarbons. A linear correlation was observed between log k' (k' is the k2 value divided by the number of reactive hydrogens) and BDE and between log k2 and E(1/2)(Ru(VI/V)); the linearity in the former case supports a H-atom abstraction mechanism. The amidation by [Ru(VI)(TMP)(NNs)2] reverses the thermodynamic reactivity order cumene > ethylbenzene/toluene, with k'(tertiary C-H)/k'(secondary
A method for rhodium(II)-catalyzed aziridination of olefins
作者:Paul Müller、Corine Baud、Yvan Jacquier
DOI:10.1016/0040-4020(95)00999-x
日期:1996.1
decomposition of (N-(p-nitrobenzenesulfonyl)imino)phenyliodinane (PhINNs) in the presence of olefins affords aziridines in yields of 18–85%. The aziridination of cis-β- methylstyrene (1h) and cis-hex-2-ene (1k) is stereospecific. However, with cis-stilbene (1m) a ca. 3:1 mixture of cis- and trans aziridines 2m and 21 is obtained. With chiral catalysts asymmetric inductions in up to 73% ee are obtained
Zirconium-Catalyzed Intermolecular Hydroamination of Unactivated Olefins
作者:Li-Wen Xu、Chun-Gu Xia、Lei Yang、Wei Zhou、Yue-Hua Gao、Wei Sun
DOI:10.1055/s-0028-1088151
日期:2009.4
Highly efficienthydroamination reactions of sulfonamides, carboxamides, and carbamates with unactivatedolefins catalyzed by simple and inexpensive zirconium salts under mild reaction conditions were presented for the practical preparation of various amines. These processes gave good to excellent yields of the addition products in Markovnikov addition fashion.
in formal insertions into CHbonds, activated by phenyl or vinyl groups, or by O-substituents. Scope and limitations of the reaction were investigated. Yields of up to 84% were achieved in the most favorable cases. Yields were enhanced by electron-releasing substituents and decreased by steric hindrance. Aziridination competed with allylic insertion with olefinic substrates. The insertion reaction proceeded
Iodine-Catalyzed Aminosulfonation of Hydrocarbons by Imidoiodinanes. a Synthetic and Mechanistic Investigation
作者:Angus A. Lamar、Kenneth M. Nicholas
DOI:10.1021/jo1015213
日期:2010.11.19
benzylic and some aliphatic saturated and unsaturatedhydrocarbons by reaction with imido-iodinanes (PhI═NSO2Ar) is catalyzed by I2 under operationally simple and mild conditions. The first examples of 1,2-functionalization of unactivated C−H bonds using imido-iodinanes as aminating agents are reported. Mechanistic investigations, including Hammett analysis, kinetic isotope effects, a cyclopropane clock experiment