Enantioselective Synthesis of Chiral Oxime Ethers: Desymmetrization and Dynamic Kinetic Resolution of Substituted Cyclohexanones
作者:Sri Krishna Nimmagadda、Sharath Chandra Mallojjala、Lukasz Woztas、Steven E. Wheeler、Jon C. Antilla
DOI:10.1002/anie.201611602
日期:2017.2.20
developed by catalytic desymmetrization of 4‐substituted cyclohexanones with O‐arylhydroxylamines and is catalyzed by a chiral BINOL‐derived strontium phosphate with excellent yields and good enantioselectivities. In addition, chiral BINOL‐derived phosphoric acid catalyzeddynamickineticresolution of α‐substituted cyclohexanones has been performed and yields versatile intermediates in high yields and
Transfer Hydrogenation of α-Branched Ketimines: Enantioselective Synthesis of Cycloalkylaminesvia Dynamic Kinetic Resolution
作者:Abel Ros、Antonio Magriz、Hansjörg Dietrich、Mark Ford、Rosario Fernández、José M. Lassaletta
DOI:10.1002/adsc.200505291
日期:2005.12
The transferhydrogenation of 2-substituted bicyclic and monocyclic ketimines using HCO2H/ Et3N as the hydrogen source and TsDPEN-based Ru(II) and Ir(III) catalysts proceeds with dynamic kinetic resolution to afford the corresponding cis-cycloalkylamines with moderate to excellent levels of diastero- and enantioselectivity. A “one-pot” procedure starting from ketones as starting materials with in situ
使用HCO 2 H / Et 3 N作为氢源以及基于TsDPEN的Ru(II)和Ir(III)催化剂进行2-取代的双环和单环酮亚胺的转移加氢,并进行动态动力学拆分,得到相应的顺式-环烷基胺非对映体和对映体选择性中等至极好的水平。还已经开发了一种以酮为起始原料并与反应中的亚胺原位形成的“一锅法”方法。
Rhodium-Catalyzed Asymmetric Hydrogenation of Tetrasubstituted Cyclic Enamides: Efficient Access to Chiral Cycloalkylamine Derivatives
An efficient rhodium‐catalyzed asymmetrichydrogenation of challenging tetrasubstituted cyclic enamides has been developed, affording cyclic chiral amides with high yields and excellent enantioselectivities (up to 99% yield and >99% ee). This novel methodology provides an efficient and concise synthetic route to chiral cycloalkylamines with two contiguous stereogenic centers. The potential utility
NACHTSHEIM, CORINA M.;FRAHM, AUGUST W., ARCH. PHARM., 322,(1989) N, C. 199-206
作者:NACHTSHEIM, CORINA M.、FRAHM, AUGUST W.
DOI:——
日期:——
Asymmetrische reduktive Aminierung von Cycloalkanonen 8. Mitt. Die EPC-Synthese arylsubstituierter cis-4aR, 10bR- und cis-4aS, 10bS-Octahydrophenanthridine
作者:Corina M. Nachtsheim、August W. Frahm
DOI:10.1002/ardp.19893220403
日期:——
Es wird die EPC‐Synthese der Octahydrophenanthridin‐hydrochloride 4 aus den optisch aktiven 2‐Arylcyclohexanaminen 1 a) unter Pictet‐Spengler‐Bedingungen und b) über die entspr. Formamide 2 und die Hexahydrophenanthridine 3 beschrieben.