Kinetic Resolution of Aminoalkenes by Asymmetric Hydroamination: A Mechanistic Study
作者:Alexanderâ L. Reznichenko、Frank Hampel、Kaiâ C. Hultzsch
DOI:10.1002/chem.200902229
日期:2009.11.23
complex for 1‐alkylaminopentenes diminishes resolution efficiency. Nevertheless, the relative cyclization rate for the two diastereomeric substrate–catalyst complexes remains in a typical range of 7–10:1. Plausible attractive π interactions between the aryl substituent and either the metal center or the aromatic system of the bis(triarylsilyl)‐substituted binaphtholate ligand may explain increased stability
Next Generation Opto‐Jasplakinolides Enable Local Remodeling of Actin Networks**
作者:Florian Küllmer、Nynke A. Vepřek、Malgorzata Borowiak、Veselin Nasufović、Sebastian Barutzki、Oliver Thorn‐Seshold、Hans‐Dieter Arndt、Dirk Trauner
DOI:10.1002/anie.202210220
日期:2022.11.25
The study of actin dynamics in biology requires tools that can be controlled with high spatial and temporal resolution. A new photoresponsive and fast-relaxing jasplakinolide (neo-optojasp) allows for the stabilization of F-actin upon irradiation with blue-green light and provides excellent spatiotemporal control. neo-Optojasp can be useful for studying actin dynamics with unprecedented spatiotemporal
Rare‐Earth‐Metal‐Catalyzed Kinetic Resolution of Chiral Aminoalkenes via Hydroamination: The Effect of the Silyl Substituent of the Binaphtholate Ligand on Resolution Efficiency
作者:Hiep N. Nguyen、Kai C. Hultzsch
DOI:10.1002/ejoc.201900107
日期:2019.4.24
The kinetic resolution of α‐substituted aminopentenes via intramolecular hydroamination was investigated using various 3,3′‐silyl‐substituted binaphtholate yttrium catalysts. High efficiencies in the kinetic resolution were observed for methyl‐, benzyl‐, and phenyl‐substituted substrates utilizing the cyclohexyldiphenylsilyl‐substituted catalyst 2c with resolution factors reaching as high as 90(5)