77221-04-6Relevant academic research and scientific papers
Conformational Behaviour of Medium-sized Rings. Part 15. 1,9,17-Triazametacyclophane-2,10,18-trione Derivatives
Elhadi, Farouk Eltayeb,Ollis, W. David,Stoddart, J. Fraser
, p. 1727 - 1732 (2007/10/02)
The stepwise synthesis of 1,9-dimethyl-1,9,17-triazametacyclophane-2,10,18-trione (1) from methyl m-aminobenzoate and m-nitrobenzoyl chloride is reported.The temperature dependences (i) of the 1H-decoupled 13C n.m.r. spectrum of the 1,9,17-trimethyl derivative (2) and (ii) of the 1H n.m.r. spectrum of the 1,9-dimethyl-17-benzyl derivative (3) are interpreted in terms of equilibration between diastereoisomeric crown and saddle conformations in solution.The 1,9-dimethyl derivative (1) is believed to exist predominantly in the saddle conformation in solution.
Synthesis and conformational behaviour of 1,9,17-triaza[2.2.2]metacyclophane-2, 10, 18-trione derivatives
Elhadi, Farouk Eltayeb,David Ollis,Fraser Stoddart,Williams, David J.,Woode, Kwamena A.
, p. 4215 - 4218 (2007/10/02)
The 1,9,17-triaza[2.2.2]metacyclophane-2, 10, 18-trione derivatives (1) - (3) have been synthesised. X-Ray crystallography shows that the 1,9,17-trimethyl derivative (3) adopts a Crown conformation (11) in the solid state. Dynamic n.m.r. spectroscopy indi
