Exploration of the Mitsunobu Reaction with Tosyl- and Boc-Hydrazones as Nucleophilic Agents
作者:John M. Keith、Leslie Gomez
DOI:10.1021/jo061185g
日期:2006.9.1
Tosyl- and Boc-hydrazones were found to be effective nucleophiles in the Mitsunobureaction. Tosyl hydrazones reacted cleanly with primary and secondaryalcohols when co-administered to a cooled DBAD/PPh3 or DEAD/PPh3 complex. Boc-hydrazones required electron-withdrawing substituents to participate in the reaction.
Convenient multi-gram scale synthesis of polybrominated imidazoles building blocks
作者:Mebarek Bahnous、Chabane Mouats、Yves Fort、Philippe C. Gros
DOI:10.1016/j.tetlet.2006.01.066
日期:2006.3
The multi-gram scale polybromination of variously substituted imidazoles has been realized using a stoichiometric amount of the Br2–DMF complex. Good yields have been obtained compared to other methods using large amounts of acetic acid–sodium acetate buffer.