排序方式: 共有299条查询结果,搜索用时 62 毫秒
291.
292.
293.
294.
295.
Wei‐Long He Min Zhao Chuan‐De Wu 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(1):174-178
Even though numerous bioinspired catalysts have been developed, there remain huge gaps between the artificial and natural catalysts, because it is very difficult to imitate simultaneously the complicated constituents, structures, and synergistic effect of enzymes. We report herein a versatile metalloporphyrinic framework platform, which exhibits high efficiency in bioinspired catalysis, photocatalysis, and asymmetric catalysis. The catalytic properties are highly dependent on the tunable constituents and their cooperation, and are significantly superior to the corresponding molecular catalyst systems which lack the synergistic effects. Since there are numerous functional moieties that can readily be incorporated into the metalloporphyrinic framework platform, a myriad of applications can be simply realized by embedding different functional moieties. 相似文献
296.
297.
298.
《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2018,130(38):12605-12609
This report widens the repertoire of emerging PdI catalysis to carbon–heteroatom, that is, C−S bond formation. While Pd0‐catalyzed protocols may suffer from the formation of poisonous sulfide‐bound off‐cycle intermediates and lack of selectivity, the mechanistically diverse PdI catalysis concept circumvents these challenges and allows for C−S bond formation (S–aryl and S–alkyl) of a wide range of aryl halides. Site‐selective thiolations of C−Br sites in the presence of C−Cl and C−OTf were achieved in a general and a priori predictable fashion. Computational, spectroscopic, X‐ray, and reactivity data support dinuclear PdI catalysis to be operative. Contrary to air‐sensitive Pd0, the active PdI species was easily recovered in the open atmosphere and subjected to multiple rounds of recycling. 相似文献
299.