914251-03-9Relevant articles and documents
Achieving conformational control over C-C, C-N and C-O bonds in biaryls, N,N′-diarylureas and diaryl ethers: Advantages of a relay axis
Betson, Mark S.,Bracegirdle, Ann,Clayden, Jonathan,Helliwell, Madeleine,Lund, Andrew,Pickworth, Mark,Snape, Timothy J.,Worrall, Christopher P.
, p. 754 - 756 (2007/10/03)
The orientation of Ar-C, Ar-N and Ar-O bonds in biaryls, N,N′-diarylureas and diaryl ethers (whose conformers are distinguishable by NMR) may be controlled with a selectivity up to >95: 5 by an adjacent stereogenic centre; the selectivity may be greater when a second stereogenic axis is inserted between the controlling centre and the slowly rotating bond. The Royal Society of Chemistry.