hydroaminoalkylation of terminal alkenes, 1,3‐dienes, or styrenes allows a direct and highly atom efficient (100 %) synthesis of amines which can result in the formation of two regioisomers, the linear and the branched product. We present a new titanium catalyst with 2,6‐bis(phenylamino)pyridinato ligands for intermolecular hydroaminoalkylation reactions of styrenes and 1‐phenyl‐1,3‐butadienes that delivers the
1,4-Butanediol as a Reducing Agent in Transfer Hydrogenation Reactions
作者:Hannah C. Maytum、Javier Francos、David J. Whatrup、Jonathan M. J. Williams
DOI:10.1002/asia.200900527
日期:2010.3.1
H2 in hydrogen‐transfer reactions to ketones, imines, and alkenes. Unlike simple alcohols, which establish equilibrium in the reduction of ketones, 1,4‐butanediol acts essentially irreversibly owing to the formation of butyrolactone, which acts as a thermodynamic sink. It is therefore not necessary to use 1,4‐butanediol in great excess in order to achieve reduction reactions. In addition, allylic alcohols
Reaction of magnesium carbenoids with N-lithio arylamines: a novel method for generation of non-stabilized α-amino-substituted carbanions and a new synthesis of α-amino acid derivatives
作者:Tsuyoshi Satoh、Atsushi Osawa、Atsushi Kondo
DOI:10.1016/j.tetlet.2004.07.069
日期:2004.8
with a Grignard reagent at low temperature afforded magnesium carbenoids in quantitative yields. The magnesium carbenoids were found to be reactive with N-lithio alkylamines and N-lithio arylamines. The reaction with N-lithio alkylamines afforded an olefin, which was derived from dimerization of the magnesium carbenoid, in moderate yield. The reaction with N-lithio arylamines gave the adducts, α-amino-substituted
Use of (Cyclopentadienone)iron Tricarbonyl Complexes for C–N Bond Formation Reactions between Amines and Alcohols
作者:Thomas J. Brown、Madeleine Cumbes、Louis J. Diorazio、Guy J. Clarkson、Martin Wills
DOI:10.1021/acs.joc.7b01990
日期:2017.10.6
of a series of (cyclopentadienone)iron tricarbonyl complexes to “borrowing hydrogen” reactionsbetweenamines and alcohols was completed in order to assess their catalytic activity. The electronic variation of the aromatic groups flanking the C═O of the cyclopentadienone influenced the efficiency of the reactions; however, in other cases, the Knölker catalyst 1, containing trimethylsilyl groups flanking
A new method for generation of non-stabilized α-amino-substituted carbanions by the reaction of magnesium carbenoids with N-lithio arylamines: their reactivity and a new synthesis of α-amino acid derivatives
the α-amino-substituted carbanions with some electrophiles was investigated and it was found that ethyl chloroformate reacted to give α-amino acid derivatives in good yields. As a whole, a new method for one-pot, three-component combined synthesis of α-amino acid derivatives from aryl 1-chloroalkyl sulfoxides was realized.