A novel ruthenium(Ⅱ)?catalyzed C-H/C-N annulation of 1?phenyl?2?pyrazolin?5?one with ethylene carbonate was designed. In this transformation, the vinylene carbonate acts as an ethynol or alkyne surrogate without any external oxidant as well as bases involved. The reaction exhibits a broad substrate scope with excellent functional group compatibility, affording a series of 1H?pyrazolo[1,2?a]cinnolin?1?ones in 42%~87% yields. A possible mechanism involving a sequential C-H activation/intramolecular C-N bond formation/ CO₂ or CO {}_{\mathrm{3}}^{\mathrm{2}-} elimination is proposed. In addition, the reaction can also be carried out on a gram scale with satisfactory yield.

Logging while drilling (LWD) technology can obtain more real formation data information than traditional logging, so it is more suitable for practical applications. What follows is how to quickly and accurately determine whether the mixture contains crude oil in the process of testing while drilling, that is, to achieve qualitative analysis of the mixture. Laser Raman spectroscopy analysis technology, as a relatively complete molecular spectroscopy technology currently developed, has been widely used in the field of many kinds of material analysis. In this paper, according to the characteristics of crude oil drilling fluid mixture, based on laser Raman spectrum analysis technology, a qualitative analysis algorithm based on partial least squares analysis was proposed. At the same time, the known Raman spectra are smoothed and denoised, baseline correction based on the fitting polynomial method, normalization and other pre?processing operations. On this basis, the feature extraction process with singular value decomposition as the main method was completed, thus attained the aim of qualitative analysis of mixture, and completed the quantitative calculation within a certain precision.

Photoinduced ATRP is a controlled radical polymerization in the presence of UV/visible light and can be used to synthesize functional polymer materials which can control the molecular structure. The polymerization kinetics was studied by changing illumination time, intensity and frequency of the light source. The amount of transition metal catalyst in photo-induced ATRP polymerization is reduced to less than 100 μg/g, which makes industrial application of controlled free radical technology possible. In this paper, the research progress of direct/indirect light-induced atom transfer radical polymerization (ATRP) is reviewed from the aspects of light source, catalyst, ligand and initiator.