Unexpected Cyclization Reaction of an Overcrowded 2-Phosphinophenylmethanimine Derivative Leading to the Formation of the First Stable 2-Phospha-2H-isoindole Derivative
摘要:
The reaction of overcrowded 2-phosphinophenylmethanimine derivative I bearing a 2,4,6-tri-t-butylphenyl (Mes*) group on the phosphorus atom and a 2,6-diisopropylphenyl (Dip) group on the nitrogen atom with potassium hydride afforded 2-phospha-2H-isoindole 2 along with Mes*H.
Unexpected Cyclization Reaction of an Overcrowded 2-Phosphinophenylmethanimine Derivative Leading to the Formation of the First Stable 2-Phospha-2H-isoindole Derivative
摘要:
The reaction of overcrowded 2-phosphinophenylmethanimine derivative I bearing a 2,4,6-tri-t-butylphenyl (Mes*) group on the phosphorus atom and a 2,6-diisopropylphenyl (Dip) group on the nitrogen atom with potassium hydride afforded 2-phospha-2H-isoindole 2 along with Mes*H.
Schiff-base type N,P-chelating ligands, phosphorus analogues of imino-anilido ligands, were designed and synthesized as a new type of ligands toward transition metals, and the rhodium-carbonyl complexes bearing the novel imino-phosphido and phosphaalkenyl-anilido ligands were synthesized as stable crystalline compounds. Their structures were definitively revealed by X-ray crystallographic analysis, showing the unique electronic features of the ligands. In addition, the effective trans-influence of the phosphorus atom was suggested on the basis of the structural parameters and spectroscopic features of the isolated complexes. (C) 2009 Elsevier Ltd. All rights reserved.