Synthetic Models of the Active Site of Cytochrome P-450. 1st Communication. The Synthesis of a Doubly-Bridged Iron(II)-Porphyrin Carrying a Tightly Bound Thiolate Ligand
The doubly-bridged iron(II)-tetraphenylporphyrin derivative 6, carrying a sterically fixed S− ligand in the ‘proximal’ position and the substrate at the ‘distal’ site, was synthesised as an enzyme model for cytochromeP-450. Compound 36, the CO complex of 6, displays a split Soret band (403 and 457 nm) similar to the native cytochromeP-450.
Processive Rotaxane Systems. Studies on the Mechanism and Control of the Threading Process
作者:Pilar Hidalgo Ramos、Ruud G. E. Coumans、Alexander B. C. Deutman、Jan M. M. Smits、Rene de Gelder、Johannes A. A. W. Elemans、Roeland J. M. Nolte、Alan E. Rowan
DOI:10.1021/ja068714i
日期:2007.5.1
The threading behavior of a zinc analogue of a previously reported processive manganese porphyrin catalyst onto a series of polymers of different lengths is reported. It is demonstrated that the speed of the threading process is determined by the opening of the cavity of the toroidal porphyrin host, which can be tuned with the help of axial ligands that coordinate to the metal center in the porphyrin.