名称:
Configurationally stable axially chiral N,N’-dialkyl-2,2’-biphenylene-N,N’-ureas
摘要:
The configurational stability, of compounds 1-4 has been confirmed by NMR spectroscopy and chiral chromatography (analytical separation of enantiomers 1 and 2); the antiaromatic (4n) destabilisation of the planar transition state of enantiomerisation is discussed.
DOI:
10.1070/mc2003v013n06abeh001749