Beckmann rearrangement of cyclotriveratrylene (CTV) oxime: tandem Beckmann-electrophilic aromatic addition
作者:Marlon R. Lutz、Matthias Zeller、Daniel P. Becker
DOI:10.1016/j.tetlet.2008.06.056
日期:2008.8
The Beckmann rearrangement has been performed on the oxime of cyclotriveratrylene (CTV) with thionyl chloride affording the ring-expanded 10-membered ring amide exclusively in high yield. Modified conditions afford a helical pentacycle derived from an unusual tandem Beckmann rearrangement and electrophilic aromatic addition followed by demethylation and tautomerization.
Attempted Resolution and Racemization of Beckmann-Derived CTV-Lactam and the Use of Chirabite-AR® to Determine the Optical Purity of the Supramolecular Scaffold
作者:Marlon R. Lutz、Elizabeth Ernst、Matthias Zeller、Jacob Dudzinski、Peter Thoresen、Daniel P. Becker
DOI:10.1002/ejoc.201800788
日期:2018.9.9
host compounds bearing three binaphthol moieties have been reported as chiral sensors with recognition of sugar derivatives.[14] The crown form of cyclotriveratrylene can undergo umbrella inversion that inverts chiral derivatives into their enantiomeric counterpart, as Collet demonstrated by observing the slow racemization of structurally chiral cyclotriveratrylene derivatives.[15] Resolution and NMR studies