SYNTHESIS AND SPATIAL STRUCTURE OF 3-PHENYLACRYLIC ACID OCTAHYDROQUINOLIZIN-1-YLMETHYL ESTER AND 2-(OCTAHYDROQUINOLIZIN-1-YLMETHYL)ISOINDOLE-1,3-DIONE

The reactions of lupinine alkaloid and its chlorine derivative with cinnamoyl chloride and 2-K-isoindole-1,3-dione were investigated to obtain 3-phenylacrylic acid octahydroquinolizin-1-ylmethyl ester and 2-(octahydroquinolizin-1-ylmethyl)isoindole-1,3-dione, respectively.The optimal conditions for carrying out the aforementioned reactions were det

This study analyzes the performance of the Shanghai Composite Index, S&P 500 index, WTI oil price, and LBMA gold price when wars took place, especially the Russia-Ukraine conflict.We employ empirical methods to explore the stability, instantaneous shock, and short-term shock regarding the abovementioned financial assets.We first adopt the event stu

The purpose of this study is to show some view-points such as the expansion of the mutual trade scale in fish and/or marine products, and newly effective use of edible marine bio-resources in each country.Total quantity of fisheries production, consumption (per capita), export china glaze beaches and toes and import quantity of Japan and Turkey bas

Hyperspectral images (HSIs) include hundreds of spectral bands, which lead to Hughes phenomenon in classification task and decrease the classification accuracy.Feature selection can remove redundant and redwing viburnum noisy features in the HSIs to overcome this phenomenon.In real applications, we may face a HSI scene with only a few labeled sampl

The present study describes an improvement of damping performance of a mechanical tensioner driven by friction force at the power spring interface, used for the timing chain system for an internal activecare spitfire combustion engine.The mechanical tensioner consists of a power spring subjected to face-to-face contact with a reciprocal motion and