Batchwise and Continuous Nanofiltration of POSS-Tagged Grubbs-Hoveyda-Type Olefin Metathesis Catalysts
作者:Anna Kajetanowicz、Justyna Czaban、G. Rajesh Krishnan、Maura Malińska、Krzysztof Woźniak、Humera Siddique、Ludmila G. Peeva、Andrew G. Livingston、Karol Grela
DOI:10.1002/cssc.201200466
日期:2013.1
New molecular‐weight‐enlarged metathesiscatalysts, which bear polyhedral oligomeric silsesquioxane (POSS) tags, were synthesized and characterized. The catalysts can be recovered from the reaction mixture by using nanofiltration techniques and can be reused. It was found that the membranes Starmem 228 and PuraMem 280 successfully separate the catalyst from the post‐reaction mixtures to below 3 ppm
The use of polyhedral oligomeric silsesquioxane (POSS) as a soluble support for organic synthesis: A case study with a POSS-bound isocyanate scavenger reagent
作者:Mark York、Richard A. Evans
DOI:10.1016/j.tetlet.2010.07.015
日期:2010.9
The use of polyhedral oligomeric silsesquioxane (POSS) as a solublesupport in organic synthesis is reported. A POSS-bound isocyanate was readily synthesised in one step from commercially available starting materials and was isolated in high yield and purity by simple filtration. It was found to perform well as a scavenger for excess amine in the solution phase synthesis of amides and sulfonamides