Selective Amine Cross-Coupling Using Iridium-Catalyzed “Borrowing Hydrogen” Methodology
作者:Ourida Saidi、A. John Blacker、Mohamed M. Farah、Stephen P. Marsden、Jonathan M. J. Williams
DOI:10.1002/anie.200904028
日期:2009.9.21
Something borrowed: Amine cross‐coupling reactions are catalyzed using [Cp*IrI2}2] (Cp*=C5Me5) in the absence of a base. A range of anilines were converted into their N‐isopropyl derivatives, and the same process was also effective for alkylation of benzylamines and other aliphatic primary amines.
借用的东西:在没有碱的情况下,使用[Cp * IrI 2 } 2 ](Cp * = C 5 Me 5)催化胺的交叉偶联反应。一系列苯胺被转化为它们的N异丙基衍生物,相同的方法对于苄胺和其他脂肪族伯胺的烷基化也有效。
Enantioselective conjugate addition to cyclic enones with scalemic lithium organo(amido)cuprates, Part IV. Relationship between ligand structure and enantioselectivity
作者:Bryant E. Rossiter、Masakatsu Eguchi、Guobin Miao、Nicole M. Swingle、Amelia E. Hernández、Denise Vickers、Ezdan Fluckiger、R. Greg Patterson、K. Vásavi Reddy
DOI:10.1016/s0040-4020(01)86278-5
日期:1993.1
Scalemic lithium amides derived from primary and secondary amines react with organocopper compounds in ether or dimethyl sulfide to form lithium organo(amido)cuprates capable of enantioselective conjugate addition to 2-cycloalkenones. The most successful heterocuprate, in which the chiral ligand is (S)-N-methyl-1-phenyl-2-(1-piperidinyl)ethanamine, (S)-MAPP, 13, reacts with cyclic enones to form products
Enantioselective reduction of <i>N</i>-alkyl ketimines with frustrated Lewis pair catalysis using chiral borenium ions
作者:Dan M. Mercea、Michael G. Howlett、Adam D. Piascik、Daniel J. Scott、Alan Steven、Andrew E. Ashley、Matthew J. Fuchter
DOI:10.1039/c9cc02900a
日期:——
Enantioselective reduction of ketimines was demonstrated using chiral N-heterocyclic carbene (NHC)-stabilised borenium ions in frustratedLewispair catalysis. High levels of enantioselectivity were achieved for substrates featuring secondary N-alkyl substituents. Comparative reactivity and mechanistic studies identify key determinants required to achieve useful enantioselectivity and represent a step
Use of<i>N</i>,<i>N</i>′-Dimethylpropyleneurea (DMPU) as Solvent in the Efficient Preparation of Enantiomerically Pure Secondary Amines
作者:Eusebio Juaristi、Peter Murer、Dieter Seebach
DOI:10.1055/s-1993-26035
日期:——
The monoalkylation of (R)- and (S)-1-phenylethylamine proceeds readily with DMPU as the solvent. An efficient procedure was then developed for the high-yield preparation of the chiral secondary amines N-benzyl-, N-isopropyl-, N-(2-biphenylyl)methyl-, N-(diphenyl)methyl-, and N-(2,2-dimethyl)propyl-1-phenylethylamine, in enantiomerically pure form.
Stereospecific DearomatisingCyclisation of Tertiary α-Amidoorganolithiums
作者:Jonathan Clayden、Faye E. Knowles、Christel J. Menet
DOI:10.1055/s-2003-40993
日期:——
Lithiation of benzamides derived from a chiral and enantiomericallypure α-methylbenzylamine leads to diastereoselective andregioselective dearomatising cyclisations with overall conservationof the stereochemistry of the starting stereogenic centre.