56042-97-8Relevant academic research and scientific papers
Addition of ureas to arynes: Straightforward synthesis of benzodiazepine and benzodiazepine derivatives
Yoshida, Hiroto,Shirakawa, Eiji,Honda, Yuki,Hiyama, Tamejiro
, p. 3247 - 3249 (2002)
Seven- and eight-membered heterocycles are formed straightforwardly, in modest to high yields in this novel addition reaction of ureas to arynes (see scheme; R = alkoxy, alkyl, aryl). The reaction of a meta-substituted aryne affords the product with perfect regioselectivity, whereas a para-substituted aryne gives a mixture of regioisomers.
Chiroptical Detection During Liquid Chromatography, Part 5: On-Line Measurement of Circular Dichroism Spectra Δε(λ) During Stops of Chromatographic Flow
Brandl, Gert,Kastner, Fritz,Fritsch, Rainer,Zinner, Herbert,Mannschreck, Albrecht
, p. 1059 - 1070 (2007/10/02)
A procedure is described which serves to measure circular dichrograms Δε(λ) on line during stops of flow in liquid chromatography.Since the concentration of substrate in the spectrometer cell during the stop is not known, the differential absorption coeff
