ChemInform Abstract: Kinetics and ESR Evidence of an Electron-Transfer Chain Mechanism for PPh3 Substitution of (Fe3(CO)12).

ChemInform ◽  
2010 ◽  
Vol 22 (49) ◽  
pp. no-no
Author(s):  
F.-H. LUO ◽  
S.-R. YANG ◽  
C.-S. LI ◽  
J.-P. DUAN ◽  
C.-H. CHENG
Keyword(s):  
Electron Transfer ◽  
Chain Mechanism ◽  
Electron Transfer Chain ◽  
Transfer Chain

scholarly journals The reduction of α-bromocamphor by tertiary amines

1992 ◽  
Vol 70 (1) ◽  
pp. 173-176 ◽  
Author(s):  
Jian Jeffrey Chen ◽  
Dennis D. Tanner
Keyword(s):  
Electron Transfer ◽  
Free Radical ◽  
Chain Termination ◽  
Tertiary Amines ◽  
Chain Mechanism ◽  
Chain Reaction ◽  
Radical Chain ◽  
Electron Transfer Chain ◽  
Chain Sequence ◽  
Transfer Chain

The reduction of α-bromocamphor to camphor by N,N-dimethylaniline (DMA) at high temperatures (> 200 °C) proceeds via a free radical chain sequence. The reduction can be effected with DMA or triethylamine (TEA) in acetonitrile at much lower temperatures in the presence of di-tert-butylperoxide. The chain termination step is the dimerization of the camphor radical. These reductions presumably constitute an example of an electron transfer chain mechanism involving a tertiary amine as the chain propagating species. Keywords: reduction, tertiary amines, α-bromocamphor, chain reaction.

scholarly journals Characterization of P450 FcpC, the Enzyme Responsible for Bioconversion of Diosgenone to Isonuatigenone in Streptomyces virginiae IBL-14

2009 ◽  
Vol 75 (12) ◽  
pp. 4202-4205 ◽  
Author(s):  
Wei Wang ◽  
Feng-Qing Wang ◽  
Dong-Zhi Wei
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Cytochrome P450 ◽  
Cytochrome P450 Monooxygenase ◽  
P450 Monooxygenase ◽  
Whole Cell ◽  
Electron Transfer Chain ◽  
Streptomyces Virginiae ◽  
Transfer Chain

ABSTRACT A new cytochrome P450 monooxygenase, FcpC, from Streptomyces virginiae IBL-14 has been identified. This enzyme is found to be responsible for the bioconversion of a pyrano-spiro steroid (diosgenone) to a rare nuatigenin-type spiro steroid (isonuatigenone), which is a novel C-25-hydroxylated diosgenone derivative. A whole-cell P450 system was developed for the production of isonuatigenone via the expression of the complete three-component electron transfer chain in an Escherichia coli strain.

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