摘要 三个新系列化合物:5-烷氧基-3-(三氟甲基)戊-2,4-二烯腈,5-(苯硫基)-3-(三氟甲基)戊-2,4-二烯腈和乙基4-烷氧基-2-据报导,通过霍纳-沃兹沃思-埃蒙斯烯化反应,由相应的烯类与氰甲基膦酸二乙酯的烯化反应制得的(氰基亚甲基)丁-3-烯酸酯。所有产品均以单一区域异构体形式获得;但是,立体异构体的组成根据烯酮取代基而变化。基于1 H和13 C NMR化学位移,1 H– 19 F和13 C– 19 F NMR偶联常数,1的研究进行1 H NMR信号积分以及HSQC,HMBC和NOESY实验,以便确定获得的每种立体异构体的结构和百分数。 三个新系列化合物:5-烷氧基-3-(三氟甲基)戊-2,4-二烯腈,5-(苯硫基)-3-(三氟甲基)戊-2,4-二烯腈和乙基4-烷氧基-2-据报导,通过霍纳-沃兹沃思-埃蒙斯烯化反应,由相应的烯类与氰甲基膦酸二乙酯的烯化反应制得的(氰基亚甲基
多取代的4-(5-(三氟甲基)-1 H-吡唑-4-基)-1 H -1,2,3-三唑体系的顺序一锅三步合成†
摘要:
这项工作报告了一个成功的一锅三步操作规程,用于合成一系列新的15个多取代的4-(5-(三氟甲基)-1 H-吡唑-4-基)-1 H -1,2实例。3-三唑类化合物,其中使用顺序的Sonogashira交叉偶联,去甲硅烷基化和铜(Ⅰ)催化的叠氮化物-炔烃环加成反应(CuAAC),总收率高达72%。连接到吡唑部分的三氟甲基取代基的存在使Sonogashira交叉偶联反应具有挑战性。另外,辅助配体XPhos的选择对于所需的杂环结构是必不可少的和必不可少的。
materials into families of isomers and congeners. Depending on the choice of the reagent, 1-methyl-5-(trifluoromethyl)pyrazole undergoes deprotonation and subsequent carboxylation mainly or exclusively at either the 4-position of the heterocycle or at the nitrogen-attached Me group. Similarly, 1-phenyl-5-(trifluoromethyl)pyrazole and 3-methyl-1-phenyl-5-(trifluoromethyl)pyrazole are selectively attacked
실리콘 함유 폴리아믹산 전구체 화합물, 이로부터 제조된 폴리아믹산 및 유무기 하이브리드 폴리이미드 필름
申请人:Skin n Skin Co., Ltd. 주식회사 스킨앤스킨(120070435418) Corp. No ▼ 131111-0165843BRN ▼129-81-98293
公开号:KR101810836B1
公开(公告)日:2017-12-20
하기 화학식 1로 표시되는 실리콘 함유 폴리아믹산 전구체 화합물이 제공된다. 003c#화학식 1003e# 상기 식에서, X 및 R은 각각 전술하여 정의된 바와 같다.
提供一种被表示为化学式1的含硅聚酰胺前体化合物。在上述式中,X和R分别如上所定义。
Reactions of β-alkoxyvinyl polyfluoroalkyl ketones with ethyl isocyanoacetate and its use for the synthesis of new polyfluoroalkyl pyrroles and pyrrolidines
作者:Ivan S. Kondratov、Violetta G. Dolovanyuk、Nataliya A. Tolmachova、Igor I. Gerus、Klaus Bergander、Roland Fröhlich、Günter Haufe
DOI:10.1039/c2ob26176f
日期:——
CDCl3. Acid treatment of the latter compounds 8 led to the hitherto unknown ethyl 5-polyfluoroalkyl-pyrrole-2-carboxylates 11 by elimination of formic acid. Catalytic hydrogenation of pyrrole 11a was used for the synthesis of earlier unknown 5-trifluoromethyl proline 16.
Uncommon fluorination of enones with xenon difluoride
作者:Igor I. Gerus、Yury I. Zhuk、Liliya M. Kacharova、Gerd-Volker Röschenthaler、Elena N. Shaitanova、Alexandr E. Sorochinskii、Sergey I. Vdovenko、Jacek Wojcik
DOI:10.1016/j.jfluchem.2019.109413
日期:2020.1
Readily available β-alkoxyvinylpolyfluoroalkyl ketones react with XeF2 to give the products of addition of two Fluorine atoms to the C = C double bond - vic-difluoro ketones, which can be easily converted to α-F enones. We demonstrated chemical evaluation of these compounds by formation of new fluorocontaining enaminones and pyrazoles. In order to obtain new precursors for bioactive compounds we performed
Novel .beta.-fluoroacyl-.beta.-halogenovinyl alkyl ethers of the formula ##STR1## in which R.sup.1 is a fluorinated alkyl group having 1 to 9 carbon atoms, Hal is a halogen atom, and R.sup.2 is an alkyl group having 1 to 7 carbon atoms, useful as insecticide intermediates, are produced by reacting a .beta.-fluoroacylvinyl ether of the formula R.sup.1 --CO--CH.dbd.CH--OR.sup.2 (II) with a halogenating agent at a temperature of -70.degree. C. to +80.degree. C., to produce a halogenation product of the formula ##STR2## and dehydrohalogenating (III) at a temperature of -20.degree. C. to +100.degree. C.