113366-83-9Relevant academic research and scientific papers
Synthesis and molecular structure of new phosphorous-crown compounds containing the thiophosphoryl group
Declercq, Jean-Paul,Delangle, Pascale,Dutasta, Jean-Pierre,Van Oostenryck, Luc,Simon, Pascal,Tinant, Bernard
, p. 2471 - 2478 (2007/10/03)
The synthesis and characterization of four phosphorus macrocycles (1-4) are reported. The X-ray crystal structures of compounds 1-4 and solvate 1-H2O show the molecules in asymmetric conformations with at least one methyl group of the phenoxy substituants oriented toward the centre of the macrocyclic cavity. Variable-temperature 1H NMR experiments show that in solution the molecules exist mainly as rapidly interconverting conformers. In the 18-membered ring 1, the dynamic process results in the enantiomerization of asymmetric conformers with a barrier of 8 kcal mol-1.? The 21-membered ring 3 is more flexible and exists in several conformations.
SYNTHESIS OF NOVEL CROWN DERIVATIVES INCORPORATING A DIAMINOPHOSPHINE GROUP IN A POLYETHER MACROCYCLE
Dutasta, Jean Pierre,Simon, Pascal
, p. 3577 - 3580 (2007/10/02)
The efficient synthesis of 17- to 21-membered ring phosphorus compounds is described.The derivatives incorporate a diaminophosphine group in a polyether macrocycle.
