Candida antarctica B lipase catalysed resolution of (±)-1-(heteroaryl)ethylamines
摘要:
Candida antarctica B lipase is an efficient catalyst for the enantioselective acetylation of (+/-)-1-(heteroaryl)ethylamines (+/-)-1a-c. (C) 1997 Elsevier Science Ltd.
Monodentate Phosphoramidites: A Breakthrough in Rhodium-Catalysed Asymmetric Hydrogenation of Olefins
作者:Michel van den Berg、Adriaan J. Minnaard、Robert M. Haak、Michel Leeman、Ebe P. Schudde、Auke Meetsma、Ben L. Feringa、André H. M. de Vries、C. Elizabeth P. Maljaars、Charlotte E. Willans、David Hyett、Jeroen A. F. Boogers、Hubertus J. W. Henderickx、Johannes G. de Vries
DOI:10.1002/adsc.200390026
日期:2003.1
ligands for the rhodium-catalysed asymmetrichydrogenation of olefins. Very high enantioselectivities were obtained with MonoPhos (7a) the simplest member of this class, a ligand that is prepared in a single step from BINOL and HMPT. Turnover numbers up to 6000 have been obtained in the hydrogenation of dehydroamino acid derivatives. Enantioselectivities in the hydrogenation of dehydroamino acids are solvent
A Chemoenzymatic Approach to Enantiomerically Pure Amines Using Dynamic Kinetic Resolution: Application to the Synthesis of Norsertraline
作者:Lisa K. Thalén、Dongbo Zhao、Jean-Baptiste Sortais、Jens Paetzold、Christine Hoben、Jan-E. Bäckvall
DOI:10.1002/chem.200802303
日期:2009.3.23
Dynamic transformation: A racemization catalyst and the enzyme Candida antarctica lipase B (CALB) were combined in a one‐pot dynamic kineticresolution (DKR) of primary amines, which were transformed to their corresponding amides in up to 95 % yield and >99 % ee. This chemoenzymatic DKR was also applied to the synthesis of norsertraline (see scheme).
New chiral ferrocene/indole-based diphosphine ligands for Rh-catalyzed asymmetric hydrogenation of functionalized olefins
作者:Zaheer Abbas、Xin-Hu Hu、Aijaz Ali、You-Wei Xu、Xiang-Ping Hu
DOI:10.1016/j.tetlet.2020.151860
日期:2020.5
Convenient synthesis of a new family of chiral ferrocene/indole-based diphosphine ligands, (Rc,Rp)-IndoFerroPhos (L), from (Sc,Rp)-PPFA and 2-(diphenylphosphino)indole has been described. These newligands exhibited high efficiency in the Rh-catalyzed asymmetric hydrogenation of functionalized olefins including α-dehydroamino acid esters, α-enamides and dimethyl itaconate, in which up to >99% yield
A highly efficient Rh-catalyzed hydrogenation of functionalized olefins has been realized by a new family of highly rigid chiral ferrocenylphosphine-spiro phosphonamidite ligands. Excellent enantiocontrol (>99% ee in most cases) was achieved with a wide range of α-dehydroamino acid esters and α-enamides. This practicable catalytic system was further applied in the scalable synthesis of highly optically
通过一个新的高刚性手性二茂铁基膦-螺亚膦酰胺配体家族,实现了功能化烯烃的高效 Rh 催化氢化。使用范围广泛的 α-脱氢氨基酸酯和 α-烯酰胺可以实现出色的对映控制(大多数情况下 >99% ee )。该实用催化体系进一步应用于西那卡塞和d-苯丙氨酸的高光学纯关键中间体的可扩展合成。
Rhodium/MonoPhos-Catalysed Asymmetric Hydrogenation of Enamides
作者:Michel van den Berg、Robert M. Haak、Adriaan J. Minnaard、André H. M. de Vries、Johannes G. de Vries、Ben L. Feringa
The monodentate phosphoramidite MonoPhos has been used in the rhodium-catalysed asymmetrichydrogenation of N-acetyl-α-arylenamides. This ligand is readilyavailable via a one-step procedure and is air stable. Its Rh(I) complex, which is an effective catalyst precursor for the hydrogenation of dehydroamino acids, also gives high enantioselectivities for this class of substrates. Because of the facile