NaIO<sub>4</sub>-Mediated Selective Oxidative Halogenation of Alkenes and Aromatics Using Alkali Metal Halides
作者:Gajanan K. Dewkar、Srinivasarao V. Narina、Arumugam Sudalai
DOI:10.1021/ol0358206
日期:2003.11.1
[reaction: see text] NaIO(4) oxidizes alkali metal halides efficiently in aqueous medium to halogenate alkenes and aromatics and produce the corresponding halo derivatives in excellent regio and stereoselectivity. The system also demonstrates the asymmetric version of bromo hydroxylation using beta-cyclodextrin complexes, resulting in moderate ee.
Selectivity relationships and substituent-substituent interactions in carbocation-forming bromination. The transition-state contribution to the .rho. variation
Determination des facteurs provoquant une variation de ρ. Une distinction est faite entre l'influence de la position de l'etat de transition et celle de la contribution thermodynamique a la reactivite
Determination des facteurs provoquant une 变异 de ρ。区别 est faite entre l'influence de la position de l'etat de transition et celle de latribution thermodynamique a la reactive
Synthesis of brominated compounds. A convenient molybdenum- catalyzed procedure inspired by the mode of action of haloperoxidases
作者:Valeria Conte、Fulvio Di Furia、Stefano Moro
DOI:10.1016/0040-4039(96)01977-6
日期:1996.11
A two-phase () procedure for the synthesis of halogenated compounds has recently been developed. Such procedure mimics the mode of action of the enzymes haloperoxidases which contain vanadium in their active center. We have investigated the possibility to substitute vanadium with molybdenum. The molybdenum-based reactions show some advantages over the vanadium-based ones. In fact reaction times are
A new reduction system: combination of sodium sulfide (sodium hydrosulfide) with phase transfer agent in a two-phase mixture. Reductive debromination ofvic-dibromides to olefins
作者:Juzo Nakayama、Haruki Machida、Masamatsu Hoshino
DOI:10.1016/s0040-4039(00)88080-6
日期:1983.1
A wide variety ofvic-dibromides are debrominated to the corresponding olefins in good to excellent yields are aqueous sodium sulfide or sodium hydrosulfide using tricotylmethylammon chloride as the phase transfer agent in a two-phase mixture.
Practical regio- and stereoselective azidation and amination of terminal alkenes
作者:Olatunji S. Ojo、Octavio Miranda、Kyle C. Baumgardner、Alejandro Bugarin
DOI:10.1039/c8ob02734j
日期:——
There is significant interest in developing more rapid and efficient production of nitrogen-containing allylic compounds, as widely used in various syntheses. This work reports a variety of allylic azides and allylic amines synthesized by an efficient, new one-pot protocol that employs readily available terminal alkenes as starting materials. This method is highly regio- and stereoselective, affording