133495-35-9Relevant academic research and scientific papers
NMR and X-ray crystallographic studies of unsymmetrical 25,26;27,28-dibridged para-tert-butyl calix[4]arene bisphosphites with a large "through-space" P-P coupling
Maji, Pathik,Krishnamurthy, Setharampattu S.,Nethaji, Munirathinam
, p. 1478 - 1486 (2010)
Three 25,26-bridged para-tert-butyl-calix[4]arene phosphites, 1-3, have been synthesized by linking two proximal phenolic oxygen atoms of para-tert-butyl-calix[4]arene to a P(OR) [R = 2,6-But 2-4-Me-C6H2 (1), 2,
Chelated bisphosphites with a calix[4]arene backbone: New ligands for rhodium-catalyzed low-pressure hydroformylation with controlled regioselectivity
Paciello, Rocco,Siggel, Lorenz,Roeper, Michael
, p. 1920 - 1923 (2007/10/03)
Extremely high regioselectivities were achieved in the rhodium-catalyzed low-pressure hydroformylation of 1-octene to n-nonanal with chelate bisphosphites that contain a p-tert-butylcalix[4]arene backbone (shown in the picture). It was possible to tailor the structures and ultimately the catalytic properties of these complexes using molecular modeling calculations.
Asymmetric Synthesis of Chiral Phosphorus Co,pounds by Destructive-Selective Oxidation of P(III) Compounds by Means of Chiral Oxaziridines
Verfuerth, Uwe,Ugi, Ivar
, p. 1627 - 1634 (2007/10/02)
From camphor and fenchone chiral N-sulfonyloxaziridines (e.g. 7, 13) are available that are well-suited for the destructive-stereoselective oxidation of P(III) compounds 16.Optimum reagents and reaction conditions for this oxidation are determined by a systematic study.Chiral P(III) and P(V) compounds can thus be prepared from racemic P(III) derivatives. Key Words : Stereoselectivity, destructive / Phosphite oxidation / Oxaziridines, chiral
