A large variety of Boc-, Bz-, Ts-, and Fmoc- protected hydrazones were prepared via condensation of an equimolar amount of carbonyl-compound and the corresponding hydrazine using a ball-mill. Hydrazones were always obtained in a quantitative yield and no solvents were used at any step. In a second step, we realized the first solvent-free N-allylation and N-benzylation of these hydrazones. (C) 2011 Elsevier Ltd. All rights reserved.
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.