Enantioselective Synthesis of (<i>R</i>)- and (<i>S</i>)-Cizolirtine; Application of Oxazaborolidine-Catalyzed Asymmetric Borane Reduction to Azolyl Phenyl Ketones
作者:Antoni Torrens、José A. Castrillo、Alex Claparols、Jordi Redondo
DOI:10.1055/s-1999-2712
日期:1999.6
An efficient enantioselective synthesis of (R)- and (S)-cizolirtine 1 is described. The key step of the procedure is the CBS-oxazaborolidine asymmetric reduction of phenyl pyrazolyl ketone 2. Related enantioselective reductions of several azolyl phenyl ketones are also reported.
Discovery of small molecules with vasodilating characteristics and adjustable hydrolytic behavior
作者:Gerda Brunhofer-Bolzer、Mario Gabriel、Christian R. Studenik、Thomas Erker
DOI:10.1016/j.bmc.2015.05.049
日期:2015.8
of a new class of vasodilating compounds obtained by lead structure optimization is described. Three groups of compounds were synthesized and tested for their activity on various smooth muscle preparations of the guinea pig. Beside the lead compound 3a, the most interesting derivative was 1H-imidazole-1-carbothioic acid O-cyclohexyl ester hydrochloride (5b) with a good selective vasodilating potential
Synthesis, characterization and physical properties of novel cholinium-based organic magnetic ionic liquids
作者:Li-rong Nie、Shun Yao、Bing Dong、Xin-lu Li、Hang Song
DOI:10.1016/j.molliq.2017.05.044
日期:2017.8
susceptibility of the MILs was measured at 298 K. Other physicalproperties such as conductivities, acidity and density were measured in range of 278.15 K to 323.15 K for further application investigation. Satisfactory results were obtained after the data of physicalproperties were correlated. Based on the measurements and correlations above, some discussions were carried out, including the ion association
本文合成了五种新型的基于胆碱的有机磁性离子液体(MIL)。碳链连接到阳离子核的氮原子。通过FT-IR,HPLC,UV-Vis,1全面鉴定了MIL1 H NMR和ESI-MS。MIL具有形成水相两相系统的有趣性能,并且在形成水相两相系统后可以响应外部磁场,这有助于磁相分离。MIL的磁化率在298 K下测量。其他物理性质(例如电导率,酸度和密度)在278.15 K至323.15 K范围内测量,以进行进一步的应用研究。将物理性质的数据进行关联后,可获得令人满意的结果。基于上述测量和相关性,进行了一些讨论,包括离子缔合和离子扩散,MIL碳链和温度对摩尔电导率的影响,阳离子尺寸对摩尔体积的影响,酸度的变化。 MILs。