92010-72-5Relevant academic research and scientific papers
Bifunctional squaramide-catalyzed synthesis of chiral dihydrocoumarins via ortho-quinone methides generated from 2-(1-tosylalkyl)phenols
Zhou, Ji,Wang, Mao-Lin,Gao, Xiang,Jiang, Guo-Fang,Zhou, Yong-Gui
, p. 3531 - 3534 (2017)
A bifunctional squaramide-catalyzed reaction of azlactones with o-quinone methides in situ generated from 2-(1-tosylalkyl)-phenols has been successfully developed under basic conditions, providing an efficient and mild access to chiral dihydrocoumarins bearing adjacent tertiary and quaternary stereogenic centers in high yields with excellent diastereo- and enantioselectivities.
Characterization of amino acids and steroids by fluorine-19 nuclear magnetic resonance spectrometry of p-fluorobenzoyl derivatives
Spratt,Meng,Dorn
, p. 76 - 81 (2007/10/02)
The utility of p-fluorobenzoyl chloride as an analytical **1**9F NMR reagent to characterize sterols and amino acids is reported. The **1**9F chemical shift data for approximately 30 sterols and amino acids are presented. The interaction of the p-fluorobenzoyl group with the steroid ring system makes a significant contribution to the **1**9F chemical shift of these steroid derivatives. These results suggest a convenient technique for characterizing different steroids (e. g. , estrogens, pregnanes, androstanes, etc. ).
