Herein, we describe a nickel-catalyzed reductive deaminative arylalkylation of tethered alkenes with pyridinium salts as C(sp 3 ) electrophiles. This two-component dicarbofunctionalization reaction enables the efficient synthesis of various benzenefused cyclic compounds bearing all-carbon quaternary centers. The approach presented in this paper proceeds under mild conditions, tolerating a wide variety of functional groups and heterocycles. It has been used to functionalize complicated molecules at a late stage.
This paper presents a remote security system based on the Internet of things. The system uses S3C2440 as the control core, Linux operating system as the software platform, combined with remote security system construction of GPRS communication technology. The system introduces V4L2 camera video capture process based on Linux operating system, the GPRS module alarm information sending and receiving process, and the project of Android platform video monitoring software. At last, experiments show the system can monitor designated area. When meeting a critical situation,it will automatically alarm. It is of far-reaching significance.
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