Action du phenyltetrafluorophosphorane sur les α ou β hydroxy-esters, -cetones, -Nitriles, -ethers, et les nitroalcools. Acces a quelques derives fonctionnels α ou β fluores
作者:D.J. Costa、N.E. Boutin、J.G. Riess
DOI:10.1016/s0040-4020(01)90666-0
日期:1974.1
The reaction of phenyltetrafluorophosphorane with secondary or tertiary α- or β -hydroxy esters, ketones, nitriles, ethers and nitro derivatives has been investigated. The formation of the alkoxyfluorophosphorane 3 has been established in several cases. Good yields of isolated fluoro compounds were obtained with MeCHFCOOEt, MeCHFCH2COOEt and Me2CFCH2NO2. These compounds eliminate HF readily.
已经研究了苯基四氟磷烷与仲或叔α-或β-羟基酯,酮,腈,醚和硝基衍生物的反应。在几种情况下已经确定了烷氧基氟磷烷3的形成。用MeCHFCOOEt,MeCHFCH 2 COOEt和Me 2 CFCH 2 NO 2获得了良好的分离出的含氟化合物。这些化合物容易消除HF。
Protection of alcohols in the presence of a new nano-sized DABCO-based ionic liquid catalyst containing zinc cation
performance of the prepared reagent was studied in the protection of alcohols in two ways using HMDS and DHP to obtain trimethylsilyl (TMS) and tetrahydropyranyl (THP) ethers, respectively. Solvent-free conditions, recoverability of the catalyst, use of low-cost starting materials, proper reaction times, high isolated yields and simple work-up procedure are among the most important features of this catalytic
在目前的研究中,一种纳米路易斯酸性催化剂被命名为1,1ˊ-(butane-1,4-diyl)bis(1,4-diazabicyclo[2.2.2]octan-1-ium)-bis-zinc( II)三氯化物是通过ZnCl 2与[C 4 (DABCO) 2 ].2Cl的简单反应制备的,并通过FT-IR(傅立叶变换红外光谱)、TGA(热重分析)、XRD(X-射线粉末衍射)、SEM(扫描电子显微镜)、ICP-OES(电感耦合等离子体发射光谱仪)和 EDX(能量色散 X 射线)分析。然后,利用HMDS和DHP两种方式研究了所制备的试剂在醇保护中的催化性能,分别得到三甲基硅基(TMS)和四氢吡喃基(THP)醚。无溶剂条件、催化剂的可回收性、低成本原材料的使用、适当的反应时间、高分离产率和简单的后处理程序是该催化方法的最重要特征。