438470-79-2Relevant academic research and scientific papers
Organocatalyst Efficiency in the α-Aminoxylation and α-Hydrazination of Carbonyl Derivatives in Aqueous Media or in a Ball-Mill
Veverková, Eva,Modrocká, Viktória,?ebesta, Radovan
, p. 1191 - 1195 (2017/03/11)
Pyrrolidine-derived organocatalysts have been tested in two types of α-heterofunctionalization reactions in aqueous media or under solvent-free ball-milling conditions. The best results in terms of both activity and enantioselectivity were obtained with O
Chemoselective room temperature E1cB N-N cleavage of oxazolidinone hydrazides from enantioselective aldehyde α-hydrazination: Synthesis of (+)-1,4-dideoxyallonojirimycin
Ferreira, Jasmin,Rees-Jones, Sophie C. M.,Ramaotsoa, Valerie,Msutu, Ath'enkosi,Hunter, Roger
supporting information, p. 1545 - 1549 (2016/02/09)
Room temperature E1cB N-N cleavage of oxazolidinone hydrazides via N-alkylation with diethyl bromomalonate and potassium or caesium carbonate as base in acetonitrile is presented. The new method has a much improved chemoselectivity, which is illustrated by a concise total synthesis of the piperidine iminosugar (+)-1,4-dideoxyallonojirimycin.
Heterogeneous Dipeptide-Catalyzed α-Amination of Aldehydes in a Continuous-Flow Reactor: Effect of Residence Time on Enantioselectivity
?tv?s, Sndor B.,Szloszr, Aliz,Mndity, Istvn M.,Fül?p, Ferenc
supporting information, p. 3671 - 3680 (2016/01/25)
A solid-supported dipeptide-catalyzed continuous-flow process was developed for the direct enantioselective α-amination of aldehydes with dibenzyl azodicarboxylate as the electrophilic nitrogen source. With residence time control as an efficient tool for
Proline-catalysed amination reactions in cyclic carbonate solvents
Beattie, Christopher,North, Michael,Villuendas, Pedro
, p. 3420 - 3432 (2011/06/22)
Propylene carbonate is shown to be an environmentally friendly and sustainable replacement for dichloromethane and acetonitrile in proline-catalysed α-hydrazinations of aldehydes and ketones. Enantioselectivities comparable to those obtained in convention
Remarkable reaction rate and excellent enantioselective direct α-amination of aldehydes with azodicarboxylates catalyzed by pyrrolidinylcamphor-derived organocatalysts
Liu, Pang-Min,Chang, Chihliang,Reddy, Raju Jannapu,Ting, Ying-Fang,Kuan, Hsuan-Hao,Chen, Kwunmin
supporting information; experimental part, p. 42 - 46 (2010/03/24)
Remarkable reaction rate and excellent enantioselective direct α-amination of unmodified aldehydes with various azodicarboxylates was catalyzed by pyrrolidinylcamphor organocatalyst 2a (5 mol-%) to provide the desired aminated products with excellent chemical yields and high to excellent levels of enantioselectivity (up to >99%ee) at 0 °C in CH 2Cl2.
Highly efficient and practical pyrrolidine-camphor-derived organocatalysts for the direct α-amination of aldehydes
Liu, Pang-Min,Magar, Dhananjay R.,Chen, Kwunmin
supporting information; scheme or table, p. 5705 - 5713 (2011/01/05)
A series of pyrrolidine-camphor-derived organocatalysts (1-4) were designed and synthesised. These organocatalysts were used for direct α-amination of aldehydes with dialkyl azodicarboxylates to give the desired α-aminated products in high chemical yields
A short enantioselective synthesis of (-)-bestatin via l-proline-catalyzed α-amination of an aldehyde
George, Shyla,Suryavanshi, Gurunath S.,Sudalai, Arumugam
scheme or table, p. 6791 - 6793 (2009/04/06)
A short and high yielding enantioselective synthesis of (-)-bestatin, a naturally occurring aminopeptidase inhibitor, is described via l-proline-catalyzed asymmetric α-amination of 3-phenylpropionaldehyde as the key reaction. The methodology also involves a Pd-catalyzed intramolecular cyclization of an allylic acetate giving a trans-oxazoline in a highly diastereoselective manner (dr > 14:1).
An organo-catalytic approach to the enantioselective synthesis of (R)-selegiline
Talluri, Siva Kumar,Sudalai, Arumugam
, p. 9758 - 9763 (2008/02/12)
An efficient enantioselective synthesis of (R)-selegiline has been achieved by two routes, via proline-catalyzed α-aminooxylation as well as α-amination of phenylpropanaldehyde as the key step.
Direct catalytic asymmetric α-amination of aldehydes
List, Benjamin
, p. 5656 - 5657 (2007/10/03)
The first direct catalytic asymmetric α-amination of aldehydes is described herein. α-Unbranched aldehydes react in this novel proline-catalyzed reaction with dialkyl azodicarboxylates to give α-amino aldehydes in excellent yields and enantioselectivities. Copyright
