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2-氟苯甲醚 反应生成 2-氟-4-硝基苯甲醚
参考文献:氯化吡咯与一些取代的苯胺反应的动力学.第6部分.4-取代和3,4-二取代的苯胺
标题:氯化吡咯与一些取代的苯胺反应的动力学.第6部分.4-取代和3,4-二取代的苯胺
摘要:已经测量了氯化吡咯与以下取代的苯胺在乙腈中的反应的arrhenius参数:4-X-(x = F,Cl,Br,I,Me或ome);3,4-X 2-(x = Cl,Br,Me或ome); 4-X-3-硝基-(x = F,Cl或me); 3-X-4-甲氧基-(x = F,Cl,Br或i); 3-氟-4-硝基-; 和3,4,5-三甲氧基苯胺.在3,4-二取代系列中,两个甲基对活化自由能的影响是严格加和的,但对于其余部分,测得的速率常数要大于在假定加和性的情况下测得的速率常数.根据过渡态在反应坐标上的位置来合理化结果.
DOI:10.1039/p29800000832

专利信息

专利号:US-8637287-B2
优先权日:2010-06-11
标题:Glycosyltransferase reversibility for sugar nucleotide synthesis
发明人：THORSON JON S; GANTT RICHARD W
权利人:THORSON JON S; GANTT RICHARD W; WISCONSIN ALUMNI RES FOUND
摘要:The present invention generally relates to materials and methods for exploiting glycosyltransferase reversibility for nucleotide diphosphate (NDP) sugar synthesis. The present invention provides engineered glycosyltransferase enzymes characterized by improved reaction reversibility and expanded sugar donor specificity as compared to corresponding non-mutated glycosyltransferase enzymes. Such reagents provide advantageous routes to NDP sugars for subsequent use in a variety of biomedical applications, including enzymatic and chemoenzymatic glycorandomization.