Diepoxide derivatives of N, N*-disubstituted disulfonamides
申请人:Pews Garth R.
公开号:US20060128978A1
公开(公告)日:2006-06-15
The present invention relates to novel diepoxides having the formulas I. and II.
R*N(A)SO
2
RSO
2
N(A)R* I
R*SO
2
N(A)RN(A)SO
2
R* II
where A=2,3-epoxypropyl, R* is a monovalent hydrocarbon alkyl aryl, aryl-alkyl, alkyl-aryl radical of 1-20 carbon atoms or a monovalent inertly substituted hydrocarbon aryl, alkyl, alkyl-aryl or aryl-alkyl radical of 1-20 carbons atoms and R is a divalent hydrocarbon arylene, alkylene, alkylene-aryl, arylene-alkyl radical or combinations thereof of 2-20 carbon atoms or an inertly substituted divalent hydrocarbon alkylene, arylene, arylene-alkyl, or alkylene-aryl radical or combinations thereof of 2-20 carbon atoms. The epoxides are useful in preparing novel epoxide resins.
本发明涉及具有以下化学式的新型双环氧化物:I. 和 II. R*N(A)SO2RSO2N(A)R* I R*SO2N(A)RN(A)SO2R* II其中 A=2,3-环氧丙基,R* 是具有 1-20 个碳原子的一价碳氢烷基芳基、芳基-烷基、烷基-芳基或一价惰性取代的碳氢烷基芳基、烷基、烷基-芳基或芳基-烷基基团,R 是具有 2-20 个碳原子的二价碳氢芳基、烷基、烷基-芳基、芳基-烷基基团或其组合,或具有 2-20 个碳原子的惰性取代的二价碳氢烷基、芳基、芳基-烷基或烷基-芳基基团或其组合。这些环氧化物可用于制备新型环氧树脂。
Nitrogen substituted cyclic enediynes: synthesis, thermal reactivity and complexation with metal ions
A number of N-substituted cyclic enediynes (azaenediynes) have been synthesized via Pd(0)-catalysed ene–yne coupling followed by N-alkylation. The simplest of them, a 10-membered monocyclic enediyne 1, underwent Bergman cyclization (BC) at 23 °C with a half-life of 72 h. The kinetics of BC slowed down considerably by fusing a benzene ring onto the enediyne. Several novel bis(azaenediyne)s and bis(diazaenediyne)s 3–6 have been synthesized. Their onset temperatures for BC were lowered under metal ion complexation conditions.
Construction and Multiple Exterior Surface Functionalization of Giant Molecular Cages
作者:Muhammad Moazzam Naseer、De-Xian Wang、Liang Zhao、Mei-Xiang Wang
DOI:10.1002/ejoc.201402963
日期:2014.12
variable-temperature 1H NMR spectroscopy, the D3h- and C3v-symmetric cage molecules underwent very slow conformational changes or deformation in solution because of their giant size and their flexible building units. Their giant cavities, different electronic interiors, and facile multipleexteriorsurfacefunctionalization could render the molecularcages powerful three-dimensional macrocyclic hosts that might
The N,N'-ditosyl-diaza[2.2]orthometacyclophanes 5 a, b were synthesized from N,N-ditosyl-metaphenylenediamine by reaction with (Z)-1,4-dichlorobutene and 1,2-bis-bromomethylbenzene, respectively. Low temperature NMR studies showed that the compound 5 b exists as a 1:1 mixture of chair and boat form of the strained (EZ)-diazanonadiene ring. At room temperature all corresponding resonances are averaged on the NMR time scale (including all four ethylene bridge protons). Going to lower temperatures, in a first step the methylene bridge inversion is frozen (giving two exo H and two endo H, DELTA-G(not-equal) ca. 52 kJ mol-1). In a second step the chair and boat form can be observed separately (DELTA-G(not-equal) ca. 43.5 kJ mol-1 for the chair/boat flip). The assignments were confirmed by 2D NMR experiments.