A method for manufacturing diaminomaleonitrile, wherein the method includes at least one step during which a cyanohydrin ketone with formula RR′COHCN, R and R′, which are the same or different, being a straight or branched alkyl chain having 1 to 5 carbon atoms, reacts in order to provide diaminomaleonitrile. The reaction step may be carried out in the presence of a catalyst.
The Long-Arm Effect: Influence of Axially Chiral Phosphoramidite Ligands on the Diastereo- and Enantioselectivity of the Tandem 1,4-Addition/Fluorination
作者:Lian Wang、Wei Meng、Chuan-Le Zhu、Yan Zheng、Jing Nie、Jun-An Ma
DOI:10.1002/anie.201104565
日期:2011.9.26
Long arm of the law: The long‐armed phosphoramidite 1 was used as a catalyst for the title reaction of acyclic alkylidene β‐ketoesters with dialkylzinc and fluorinating reagents. The products, containing adjacent carbon‐ and fluorine‐substituted stereocenters, are obtained in high yield as well as diastereo‐ and enantioselectivity. NSFI=N‐fluorobenzenesulfonimide.
[EN] COMPOSITION, SYNTHESIS, AND USE OF A NEW CLASS OF ISONITRILES<br/>[FR] COMPOSITION, SYNTHÈSE ET UTILISATION D'UNE NOUVELLE CLASSE D'ISONITRILES
申请人:UNIV HOLY GHOST DUQUESNE
公开号:WO2015127226A1
公开(公告)日:2015-08-27
This invention relates to novel isonitriles, including arylthio isonitriles, and methods for their preparation. The isonitriles include a conjugated ring system. The structure is designed with the flexibility to have multiple substitution patterns. The isonitriles may be used in applications including, but not limited to, pharmaceutical compositions.
Rapid Analysis of Tetrakis(dialkylamino)phosphonium Stability in Alkaline Media
作者:C. Tyler Womble、Jamie Kang、Kristina M. Hugar、Geoffrey W. Coates、Stefan Bernhard、Kevin J. T. Noonan
DOI:10.1021/acs.organomet.7b00663
日期:2017.10.23
to alkaline media; however, very few investigations have systematically evaluated how these cations decompose in the presence of hydroxide or alkoxide anions. The excellent stability of several tetraaminophosphoniums in 2 M KOH/CH3OH at 80 °C led us to design experiments for the rapid assessment of phosphonium degradation in homogeneous solution and under phase-transfer conditions. The analysis illustrated
氢氧化物稳定的有机阳离子是电化学能量系统中离子迁移过程的关键组成部分,四(二烷基氨基)阳离子是该应用的有希望的候选者。已知这些phospho对碱性介质具有高度的抵抗力。但是,很少有研究系统地评估这些阳离子在氢氧根或醇盐阴离子存在下的分解方式。几种四氨基phosph在2 M KOH / CH 3中的优异稳定性在80°C的OH下,我们设计了用于快速评估homogeneous在均相溶液中和相转移条件下降解的实验。分析表明,阳离子核心周围的取代基如何影响降解途径和降解速率。在醇溶剂中观察到最常见的降解途径是β-H的消除和对磷原子的直接侵蚀,而在相转移条件下(PhCl和50 wt%NaOH / H 2 O)则观察到α-H的提取和直接侵蚀。。收集的数据提供了该阳离子家族的相对稳定性比较,以实现将来的设计改进,并说明了使用多种测试进行降解研究的实用性。