The present invention relates to novel compounds possessing specific hot, pungent and spicy taste when subjected to direct pungency evaluation, which may be useful as food additives and anti-oxidants, however the said compounds do not add to any nutritional value but the synthesised compounds can possess useful pharmacological properties which is expected to find application in new test models for the development of anti-inflammatory drugs, bioavailability enhancers and for the study of hepatic drug metabolising mechanism; also relates to a process for preparing the said compounds.
As a result of extensive studies on NAD(P)H oxidase inhibitors, the present inventors found that a quinolone derivative having, at the 2-position, an alkyl group substituted with a heteroatom or the like has an excellent NAD(P)H oxidase inhibitory activity, and accomplished the present invention. The compound of the present invention has a reactive oxygen species production inhibitory activity based on the NAD(P)H oxidase inhibitory activity, and therefore can be used as an agent for preventing and/or treating diabetes, impaired glucose tolerance, hyperlipidemia, fatty liver, diabetic complications and the like.
High Value-Added Application of Natural Plant Products in Crop Protection: Construction and Pesticidal Activities of Piperine-Type Ester Derivatives and Their Toxicology Study
To discover new potential pesticide candidates, recently, structural modification of natural bioactive products has received much attention. In this work, a series of new piperine-type ester derivatives were regio- and stereoselectively synthesized based on a natural alkaloid piperine isolated from Piper nigrum. Their structures were characterized by IR, mp, 1H NMR (13C NMR), and high-resolution mass
为了发现新的潜在候选农药,最近,天然生物活性产品的结构修饰受到了广泛关注。在这项工作中,基于从胡椒中分离的天然生物碱胡椒碱,区域选择性和立体选择性地合成了一系列新的胡椒碱型酯衍生物。它们的结构通过IR、mp、1 H NMR(13 C NMR)和高分辨率质谱(HRMS)表征。针对Tetranychus cinnabarinus Boisduval(螨虫:Tetranychidae),化合物4e、4f、4u和4v显示出最显着的杀螨活性,LC为 50值分别为 0.155、0.117、0.177 和 0.164 mg/mL。特别是,化合物4f的杀螨活性比胡椒碱高 120 倍以上(LC 50:14.198 mg/mL)。值得注意的是,4f的杀螨活性与商业杀螨剂螺螨酯的杀螨活性相当(LC 50:0.115 mg/mL)。此外,针对Eriosoma lanigerum Hausmann(半翅目:蚜科),化合物4w和4b'显示出胡椒碱