188488-61-1Relevant academic research and scientific papers
Asymmetric transfer hydrogenations of β-N-substituted enamino esters with ammonia borane
Zhao, Weiwei,Feng, Xiangqing,Yang, Jing,Du, Haifeng
supporting information, p. 1193 - 1196 (2019/04/03)
Optically active β-amino acids and their derivatives are very useful building blocks in synthetic and medicinal chemistry. The catalytic asymmetric reduction of β-enamino esters is one of the most efficient approaches for their synthesis. Ammonia borane w
Solid Supported Chiral N-Picolylimidazolidinones: Recyclable Catalysts for the Enantioselective, Metal- and Hydrogen-Free Reduction of Imines in Batch and in Flow Mode
Porta, Riccardo,Benaglia, Maurizio,Annunziata, Rita,Puglisi, Alessandra,Celentano, Giuseppe
supporting information, p. 2375 - 2382 (2017/07/22)
A new class of solid supported chiral imidazolidinone organocatalysts for the catalytic reduction of imines with trichlorosilane has been developed. Polystyrene proved to be a more effective support than silica in terms of both chemical and stereochemical
Synthesis of a series of novel chiral Lewis base catalysts and their application in promoting asymmetric hydrosilylation of β-enamino esters
Chen, Xing,Hu, Xiao-Yan,Shu, Chang,Zhang, Yong-Hong,Zheng, Yong-Sheng,Jiang, Yan,Yuan, Wei-Cheng,Liu, Bo,Zhang, Xiao-Mei
supporting information, p. 3089 - 3093 (2013/06/04)
A series of novel chiral Lewis base catalysts were synthesized from l-serine and applied in the hydrosilylation of β-enamino esters, in which the optimal one promoted the reactions to afford a wide variety of β-amino esters in good yields with good enantioselectivities. It is noteworthy that several cyclic substrates were hydrosilylated under the optimal conditions to give the cyclic β-amino esters with high yields, good diastereoselectivities as well as good ee values. The Royal Society of Chemistry 2013.
New, readily available organocatalysts for the enantioselective reduction of α-imino- and β-imino esters
Bonsignore, Martina,Benaglia, Maurizio,Annunziata, Rita,Celentano, Giuseppe
scheme or table, p. 1085 - 1088 (2011/06/20)
Novel metal-free, readily available chiral catalytic systems for the enantioselective reduction of keto imines are reported. Different β-imino esters were reduced by trichlorosilane in the presence of 10 mol% of a chiral Lewis base easily obtained in one
Lithium amide assisted asymmetric Mannich-type reactions of menthyl acetate with PMP-aldimines
Hata, Seiji,Iguchi, Mayu,Iwasawa, Tetsuo,Yamada, Ken-Ichi,Tomioka, Kiyoshi
, p. 1721 - 1723 (2007/10/03)
Matrix presented. A lithium enolate of menthyl acetate added to PMP-imines, in the presence of an equimolar amount of lithium diisopropylamide, affords the Mannich-type addition products in high stereoselectivity.
