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Aequationes mathematicae - 相似文献
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Chan KL Watkins SE Mak CS McKiernan MJ Towns CR Pascu SI Holmes AB 《Chemical communications (Cambridge, England)》2005,(46):5766-5768
The preparation of the 3,6-disubstituted dibenzosilole monomers , and by two different routes is described; Suzuki copolymerisation afforded poly(9,9-dioctyl-3,6-dibenzosilole) which has a sufficiently high triplet energy (2.55 eV) to function as a host for green electrophosphorescent emitters. 相似文献
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McKiernan M Huck J Fehrentz JA Roumestant ML Viallefont P Martinez J 《The Journal of organic chemistry》2001,66(20):6541-6544
A general method has been developed for the synthesis of N-tert-butyloxycarbonyl N-carboxyanhydrides from beta-amino acids using Vilsmeier complex. These beta-UNCA are stable, and the reactivity with different nucleophiles (alcohol, amine, lithium enolate) was studied. 相似文献
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Leach SG Cordier CJ Morton D McKiernan GJ Warriner S Nelson A 《The Journal of organic chemistry》2008,73(7):2753-2759
A fluorous-tagged linker for the parallel synthesis of small- and medium-ring and macrocyclic nitrogen heterocycles using ring-closing metathesis is described. The linker was designed such that "cyclization-release" of the cyclic heterocyclic products was coupled with liberation of the active catalyst. The design of the linker was validated using a non-fluorous-tagged model. A wide range of unsaturated alcohols were used as reagents to functionalize a fluorous-tagged sulfonamide, (Z)-{N-[4-(2-(N'-3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)-4-methylsulfonamido)methylallyloxy]but-2-enyl}-2-nitrobenzenesulfonamide, using Fukuyama-Mitsunobu reactions; in each case, fluorous-solid-phase extraction (F-SPE) was used to purify the functionalized linker from the excess reagents. In general, the "cyclization-release" of cyclic products was triggered using a light-fluorous tagged derivative of the Grubbs-Hoveyda second-generation catalyst. After the metathesis step, F-SPE was used to purify released cyclic compounds from the fluorous-tagged linker and the fluorous-tagged catalyst. The scope and limitations of the approach were determined using a range of substrates which probed different aspects of the functionalization and metathesis steps. In the study as a whole, a wide range of small- and medium-ring and macrocyclic nitrogen heterocycles were prepared using polyene and polyenyne metathesis cascades. 相似文献
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