Highly Enantioselective Transfer Hydrogenation of Ketones with Chiral (NH)<sub>2</sub>P<sub>2</sub>Macrocyclic Iron(II) Complexes
作者:Raphael Bigler、Raffael Huber、Antonio Mezzetti
DOI:10.1002/anie.201501807
日期:2015.4.20
Bis(isonitrile) iron(II) complexes bearing a C2‐symmetric diamino (NH)2P2 macrocyclic ligand efficiently catalyze the hydrogenation of polar bonds of a broad scope of substrates (ketones, enones, and imines) in high yield (up to 99.5 %), excellent enantioselectivity (up to 99 % ee), and with low catalyst loading (generally 0.1 mol %). The catalyst can be easily tuned by modifying the substituents of
带有C 2对称的二氨基(NH)2 P 2大环配体的双(异腈)铁(II)络合物可以高产率(上)高效催化广泛范围内底物(酮,烯酮和亚胺)的极性键氢化。至99.5%(99.5%ee),优异的对映选择性(高达99%ee),并且催化剂负载量低(通常为0.1 mol%)。通过修饰异腈配体的取代基可以容易地调节催化剂。
Efficient mixing, temperature control and small environmental exposures allow reactions carried out in microfluidic de vices to perform superior to their batch-type counterparts in conventional flasks. The Ritterreaction has been optimised for flow conditions leading to short reaction times and higher yields and also is more feasible with regards to safety, productivity and tolerance towards substrate
To find out selective potassium channel openers (PCOs), we synthesized several 3,5-disubstituted phenylcyanoguanidine derivatives and investigated their structure-activity relationships (SAR). As a result, we discovered selective PCOs having 1,1-diethylpropyl group toward antihypertensive activity. (C) 1998 Elsevier Science Ltd. All rights reserved.
N-Nitroamides and N-Nitrocarbamates. III. Rotational Isomerism, Steric Effects, and Physical Properties at Low Temperatures<sup>1</sup>