Stereoselective control in the Staudinger reactions involving monosubstituted ketenes with electron acceptor substituents: experimental investigation and theoretical rationalization
Conversion of Hydroxyl Groups in Alcohols to Other Functional Groups with<i>N</i>-Hydroxy-2-thiopyridone, and Its Application to Dialkylamines and Thiols
作者:Hideo Togo、Misa Fujii、Masataka Yokoyama
DOI:10.1246/bcsj.64.57
日期:1991.1
The radical decarboxylation reaction of N-alkoxyoxalyloxy-2-thiopyridone which was prepared by the reaction of alcohol, oxalyl chloride, and N-hydroxy-2-thiopyridone was studied both in the absence and presence of olefinic compounds. The same reactions with olefinic and acetylenic alcohols gave the corresponding lactone derivatives. On the other hand the unsymmetrical alkyl 2-pyridyl disulfides were obtained by the same reaction with aliphatic thiols.
Design, Synthesis, Structure, and Acaricidal/Insecticidal Activity of Novel Spirocyclic Tetronic Acid Derivatives Containing an Oxalyl Moiety
作者:Zhihui Liu、Qiong Lei、Yongqiang Li、Lixia Xiong、Haibin Song、Qingmin Wang
DOI:10.1021/jf203722z
日期:2011.12.14
1.4- and 2.3-fold as high as the activities of commercial Spiromesifen, respectively, against spider mite eggs. Moreover, most of the target compounds exhibited insecticidalactivities against Lepidoptera pest. Interestingly, compounds containing alkylamino-substituted oxalyl moiety showed obvious selectivity between spider mite larvae and eggs because the activities against spider mite eggs of 7g and
通过关键中间体3-(2,4,6-三甲基)-2-oxo-1-oxaspiro [4.4] -decyl-3-en-4设计并合成了一系列含有草酰部分的新型螺环四酸衍生物-ol。通过1 H NMR和元素分析或高分辨率质谱(HRMS)鉴定目标化合物。生物测定的结果表明,大多数目标化合物对胭脂红蜘蛛幼虫和卵具有出色的杀螨活性。特别是二异丙基氨基草酰化合物7g和哌啶草酰化合物7h分别是市售Spiromesifen对红蜘蛛卵的活性的1.4倍和2.3倍。而且,大多数目标化合物对鳞翅目害虫表现出杀虫活性。有趣的是,含有烷基氨基取代的草酰部分的化合物在红蜘蛛幼虫和卵之间显示出明显的选择性,因为对7g和7h的红蜘蛛卵的活性是对红蜘蛛幼虫的25倍,而Spiromesifen在这些活性上没有显着差异。这意味着将草酰部分引入螺环四氢苯甲酸可能会导致新的生物活性特征。
The invention provides a compound which exhibits satisfactory peroral absorbability and excellent antagonistic activity against NK-1 receptor or NK-2 receptor. The compound is a benzylamine derivative represented by formula (1) or a salt thereof.
The biomimetic design of a transition metal complex based on the iron(IV)-oxoporphyrin π-cation radical species in cytochrome P450 enzymes has been studied extensively. Herein, we translate the functions of this iron(IV)-oxoporphyrin π-cation radical species to an α-ketoacyl phosphonium species comprised of non-metal atoms and utilize it as a light-activated oxygenation auxiliary for ortho-selective
基于细胞色素 P450 酶中铁(IV)-氧代卟啉 π-阳离子自由基物种的过渡金属配合物的仿生设计已得到广泛研究。在此,我们将这种铁( IV )-氧代卟啉π-阳离子自由基物种的功能转化为由非金属原子组成的α-酮酰基鏻物种,并将其用作苯胺邻位选择性氧化的光激活氧化辅助剂。可见光照射将 α-酮酰基鏻物质转化为激发态,充当瞬时产生的氧化剂。该过程的分子内性质确保了高区域选择性和化学选择性。辅助装置可轻松拆卸。还描述了一锅法。