The rates at various temperatures were determined by means of nmr technique, which gave the initiation rate constants (ki) as well as the activation... T Saegusa,Y Kimura,H Fujii,... - 《Macromolecules》 被引量: 298发表: 1973年 Stereoselective syntheses of trans-fused 6,6- and 6,7-...
NMR Group, Indian Institute of Chemical Technology, Hyderabad 500 007, IndiaElsevier LtdTetrahedron AsymmetrySharma, G. V. M,Begum, A.,Ravinder Reddy, K.,Ravi Sankar, A.,Kunwar, A. C.Highly stereoselective synthesis of furano-oxepanes:intramolecular nitrone cycloaddition (INC) reactions on sugar...
from 1H-NMR and IR spectra it can be deduced that stannous 2-ethylhexanoate coordinates with the anhydride bond of the ring, and that the resulting species reacts with the monomer by ring-opening of the acyl-oxygen bond. These observations indicate a non-ionic insertion polymerization mechanism ...
Products Intro: Product Name:4-bromooxepaneCAS:942144-28-7Purity:95% by NMR Package:1G,5G Remarks:R&D in stock EN CB Index: 58 WebSite: www.acblock-lab.com Related Information: Sales Network Catalog(9964) User Evaluation1 Tag: 942144-28-7 ...
A higher proportion of secondary oxonium ions (these species detected by 19F NMR were independently observed by proton trapping with R3P in the 31P NMR spectrum). The proportion of ionic species decreases with monomer conversion, indicating a substantial contribution of bimolecular ionization of the ...
UV, IR, NMR, and MS spectral analyses as well as molecular modelling were utilized for structure elucidation of these compounds. Cytotoxic activity of 1-4 was evaluated towards MCF7, A549, HeLa, HCT116, and PC12 cancer cell lines using MTT assay. Results: A new oxepane derivative namely, ...
Structures were established by analysis of MS and NMR data, and the biogenetic derivation of the new compounds is discussed.doi:10.1016/j.tet.2011.03.062Alberto PaganiFernando ScalaGiuseppina ChianeseGianpaolo GrassiOrazio Taglialatela-ScafatiElsevier LtdTetrahedron...
perfluoro(2-chloromethyloxane) and perfluoro(2-chloromethyloxolane), were obtained only in small yields, respectively. These new compounds have been characterized by elemental analysis, and infrared, mass and 19F nmr spectra.doi:10.1016/S0022-1139(00)83098-5Takashi...
Formation and reactivity of new NicholasâFerrier pyranosidic cations: novel access to oxepanes viaa 1,6-hydride shift/cyclization sequenceElectronic supplementary information (ESI) available: Experimental details and NMR spectra...Pyranosidic allylic (Ferrier) cations that share dicobalt hexac...
oxepanestoxins2,3-Disubstituted oxepanes 3 and 4 were stereoselectively synthesized from methoxyallene (1) and iodide 2. The TRANS stereochemistry of diol 3 was established by NMR studies of the bicyclic precursor 10, while the CIS stereochemistry of 4 was secured by using the highly ...