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Rhodium(III)‐catalyzed oxindole‐directed oxidative Heck‐type olefination reactions of N‐aryloxindoles and olefins represent an efficient approach for the construction of C−C bond. It offers a straightforward and atom‐economical method for the synthesis of functionalized oxindole alkenylation derivatives in moderate to excellent yields. C‐H Activation: Rhodium(III)‐catalyzed oxindole‐directed oxidative Heck‐type olefination reactions of N‐aryloxindoles and olefins represent an efficient approach for the construction of C−C bond. It offers a straightforward and atom‐economical method for the synthesis of functionalized oxindole alkenylation derivatives in moderate to excellent yields. [ABSTRACT FROM AUTHOR]

Abstract: The dual behaviour of acyl azides in transition‐metal‐catalyzed direct C−H amidation is investigated. Variously substituted acyl azides reacted smoothly with 7‐azaindoles providing a diversity of C−C or C−N 7‐azaindole amidated derivatives. This amidation reaction shows an excellent controllability, which is believed to be dependent on catalyst system. [ABSTRACT FROM AUTHOR]

A convenient rhodium(III)-catalyzed cascade reaction of 7-azaindoles and alkynes through multiple C−H bond activation for the synthesis of unique [5]azahelicenes has been developed. The optical property of these screw-shaped helicene derivatives could be further utilized in electronic devices to recognize mercury ions. [ABSTRACT FROM AUTHOR]

An efficient rhodium-catalyzed dehydrogenative Heck-type reaction between N-aryl-substituted 7-azaindoles and various alkenes through a H2-releasing process without the need of any oxidizing agent was developed. The novel methodology broadens the scope of metal-catalyzed hydrogen-releasing reactions to include rhodium catalysis. [ABSTRACT FROM AUTHOR]

The reconstruction capability of the blue phase (BP) template with low polymer concentration was investigated. A threshold polymer concentration to reconstruct the BP with the chiral three-dimensional template was confirmed in different kinds of polymer systems. The anchoring energy of the template may reassemble the double twist cylinder structure of BP liquid crystal (BPLC) by refilling either the same-handed or reverse-handed chiral materials within a certain range of helical twisting power (HTP). Meanwhile, because of the lowered anchoring energy, the kerr constant of the reconstructed BPLC increased by 104%, from 1.81 nm/V2 to 3.70 nm/V2, by refilling the reverse-handed chiral material. [ABSTRACT FROM AUTHOR]

The anchoring energy of blue phase polymer template containing different concentration of conventional polymer has been studied. The lower bound of polymer concentration to form the chiral three-dimensional template of blue phase is confirmed. And it was demonstrated that the template anchoring energy has a threshold value to reassemble the double twist cylinder structure of blue phase liquid crystal by either refilling same-handed chiral materials or reverse-handed chiral materials which may help to improve the driving capacity of the polymer stabilized blue phase liquid crystal. [ABSTRACT FROM AUTHOR]

Rhodium Catalysis An efficient rhodium‐catalyzed dehydrogenative Heck‐type reaction (DHR) between N‐aryl substituted 7‐azaindoles and various alkenes through a H2‐releasing process without the need of any oxidizing agent was developed. This atom‐economical and environmentally friendly DHR method broadens the scope of metal‐catalyzed hydrogen‐releasing reactions to include rhodium catalysis. For more details, see the Communication by L. Dong et al. on page 17926 ff. [ABSTRACT FROM AUTHOR]