The crude product was purified on a silica-gel column using a mixture of petroleum ether and ethyl acetate, yielding light yellow solid (yield: 50%). Structural analysis: 1 H NMR (300 MHz, CDCl3) data δ 7.88 (d, J = 8.7 Hz, 2H), 7.69 (d, J = 8.2 Hz, 2H), 7.11 (d, J ...
tallized from petroleum ether to yield black crystals of [Cu(CsHIIN2)(CfI-IfNO)]. Analysis: calculated forIntroduction. Crystal structures of several bis(2-pyrro- CI4HITCuN3O, C: 54.81, H: 5.55, N: 13.70,lylrnethylenamine)-metal complexes, prepared by the Cu:20.71%. Found, C:54.49,...
Much of thechemistryof phenols is like that ofalcohols. For example, phenols react with acids to giveesters, and phenoxide ions (ArO−) can be goodnucleophilesin Williamsonethersynthesis. Acidityof phenols Although phenols are often considered simply as aromatic alcohols, they do have somewhat dif...
Polyether ether ketone (PEEK) • Rod form • Tough • Spring function • Dynamic AFOS Kydex • Composite of acrylic and polyvinyl chloride (PVC) • Reinforcing material • Thermoforming • Outstanding toughness • Supporting material in Cervical collars (neck orthosis) • Spinal ortho...
et al. Cytotoxic activity and composition of petroleum ether extract from Magydaris tomentosa (Desf.) WDJ Koch (Apiaceae). Molecules 20, 1571–1578 (2015). Article Google Scholar Musa, M. A., Cooperwood, J. S. & Khan, M. O. A Review of Coumarin Derivatives in Pharmacotherapy of ...
The stem bark of Garcinia huillensis grown in Zaïre and used in centralAfrican traditional medicine has been subjected to a bioassay-guided fractionation. The chemotherapeutically active petroleum ether extract afforded fatty acids, aliphatic alcohols, triterpenes and a polyisoprenylated benzophenone, ...
It crystallizes from dichloromethane/petroleum ether monoclinically in the space group P21/c with a = 1509.0(3)... K Peters,Peters, E.-M,HG Von Schnering,... - 《Zeitschrift Für Kristallographie》 被引量: 1发表: 1994年 The crystal structure of (2a′ S ,2a1′ S ,3 R ,5a′ S ...
(ReceivedDecember2,1994,CSD-No.402058)C6CllSourceofmaterial:ThecompoundwaspreparedfromphosgeneandCa-ethyl-(,S)-phenylalanine.Crystallizationfromethylaceta-te-diethylether-petroleumether.M.pt.:416-417K.TheN-carboxyanhydride(NCA)ringgeometrycompareswellwithpublishedaminoacidNCA's(seeréf.1andreferencesthere-...
Bee-collected rape pollen extracted with 75% EtOH,and the mixture was suspended in H2O and was extracted and degreased successively with petroleum ether.The compounds were isolated by polyamide column chromatography and Octadecyl silane chemically bonded to silica gel column chromatography.Three compounds...
Crystals suitable for X-ray diffraction analysis were grown by slow evaporation of a solution of the title compound in a 1:1:1 mixture of petroleum ether, chloroform and methanol. Experimental details The positions of the hydrogen atoms were calculated using AFIX. AllΗ atoms were included in ...