基于结构-活性关系 乙恶唑设计并合成了一系列的2-(2,6-二氟苯基)-4-(4-取代的苯基)-1,3-恶唑啉4a-y和苯甲酰基苯基脲。发现大多数这些化合物显示出优异的杀螨活性。当浓度为2.5 mg L -1时,它们对蜘蛛螨的卵和幼虫的死亡率都达到85%以上。一些化合物还表现出优异的杀虫活性。2,4-二苯基-1,3-恶唑啉的4-苯基上的取代基的位置和类型对活性有很大影响。2-(2,6-二氟苯基)-4-(2-Cl-4-(4-Cl-苯氧基)苯基)-1,3-恶唑啉(4r)在2.5 mg L -1下表现出100%的杀螨作用,对甜菜夜蛾和小菜蛾的死亡率分别为12.5 mg L -1和65%和93%,几乎与乙恶唑。新发现的结构-活性关系也可能有益于进一步的杀螨剂/杀虫剂开发。
Photochemical Generation and Reactivity of Naphthyl Cations:cine Substitution
作者:Micha Slegt、Floor Minne、Han Zuilhof、Hermen S. Overkleeft、Gerrit Lodder
DOI:10.1002/ejoc.200700338
日期:2007.11
donium tetrafluoroborate in methanol regiospecifically yield the naphthalen-1- and -2-yl ethers but afford scrambled 1- and 2-phenylnaphthalene Friedel-Crafts products. It is demonstrated that singlet naphthyl cations account for the formation of the naphthyl ethers, but that the cine substitution is most likely to be due to the intermediacy of triplet naphthyl cations. According to the experiments
萘-1-基(苯基)碘四氟硼酸盐和萘-2-基(苯基)碘四氟硼酸盐在甲醇中的光化学溶剂分解区域特异性地产生萘-1-和-2-基醚,但提供杂乱的1-和2-苯基萘Friedel -工艺品产品。证明单线态萘基阳离子导致了萘基醚的形成,但电影取代最有可能是由于三线态萘基阳离子的中介作用。根据这里报道的实验,单线态萘基阳离子的能量低于它们的三线态异构体。甲醇中阳离子的高水平 MO 计算支持这一发现。
Well-Defined Copper(I) Fluoroalkoxide Complexes for Trifluoroethoxylation of Aryl and Heteroaryl Bromides
Copper(I) fluoroalkoxidecomplexes bearing dinitrogen ligands were synthesized and the structure and reactivity of the complexes toward trifluoroethoxylation, pentafluoropropoxylation, and tetrafluoropropoxylation of aryl and heteroarylbromides were investigated.
Transition-Metal-Mediated Synthesis of Trifluoroethyl Aryl Ethers
作者:Zhiqiang Weng、Yangjie Huang、Ronglu Huang
DOI:10.1055/s-0035-1560054
日期:——
A series of well-definedcopper(I) fluoroalkoxidecomplexes, [(phen)2Cu][OCH2RF], have been shown to undergo trifluoroethoxylation, pentafluoropropoxylation, and tetrafluoropropoxylation with aryl and heteroarylbromides to generate the corresponding trifluoroethyl, pentafluoropropyl, and tetrafluoropropyl (hetero)aryl ethers in good to excellent yields. The reaction tolerates a variety of functional
Expedient and efficient one pot synthesis of trifluoroethyl ethers from metal free 2,4,6-tris-(2,2,2-trifluoro-ethoxy)-[1,3,5] triazene
作者:Shrawan Kumar Mangawa、Chiranjeev Sharma、Ashawani kumar Singh、Satish K. Awasthi
DOI:10.1039/c5ra00618j
日期:——
An efficient synthesis of fluorinated alkyl and aryl ethers was achieved by the use of s-triazene derived fluorinated reagent 2,4,6-tris-(2,2,2-trifluoro-ethoxy)-[1,3,5] triazene (TriTFET).
An efficient copper-catalyzed Chan–Lam reaction of trifluoroethanol with a variety of aryl- and heteroaryl boronicacids has been developed. This research provides a practical method to synthesize trifluoroethyl aryl ethers in moderate to good yields under mild conditions.