Chemoenzymatic, enantiocomplementary, total asymmetric synthesis of leukotrienes-B3 and -B4
作者:Ian C. Cotterill、Gy�rgy Dorman、Kurt Faber、Rabih Jaouhari、Stanley M. Roberts、Feodor Scheinmann、Josef Spreitz、Alan G. Sutherland、John A. Winders、Basil J. Wakefield
DOI:10.1039/c39900001661
日期:——
The ketone 3 has been resolved using various enzyme-catalysed reactions and the enantiomer (+)-3 was transformed into the benzoate 8 while (–)-3 was converted into the esters 10 and 11; compounds 8 and 10 are complementary sections of leukotriene B4 while compounds 8 and 11 are late-stage synthons for leukotriene B3.
Synthesis of (3S,4R)-eldanolide and (5S,12R)-leukotriene-B4 through photolysis of optically active hydroxy-7,7-dimethylbicyclo[3.2.0]heptanones
作者:H. Geoff Davies、Stanley M. Roberts、Basil J. Wakefield、John A. Winders
DOI:10.1039/c39850001166
日期:——
Photoisomerisation of 3-hydroxy-7,7-dimethylbicyclo[3.2.0]heptan-6-ones is the key step in a new route to the pheromone eldanolide while leukotriene-B4 is available through a photolytic retro[2 + 2] reaction of 2-hydroxy-7,7-dimethylbicyclo[3.2.0]heptan-6-ones.
Reduction of bicyclo[3.2.0] hept-2-en-6-one and 7,7-dimethylbicyclo[3.2.0]hept-2-en-6-one using dehydrogenase enzymes and the fungus mortierella ramanniana
作者:Suzanne Butt、H.Geoff Davies、Michael J. Dawson、Gordon C. Lawrence、Jeff Leaver、Stanley M. Roberts、Michael K. Turner、Basil J. Wakefield、Wilfred F. Wall、John A. Winders
DOI:10.1016/s0040-4039(01)80857-1
日期:1985.1
Bicyclo[3.2.0]hept-2-en-6-one (1) was reduced with an alcohol dehydrogenase from and a whole cell system () with excellent substrate enantioselectivity: 7,7-dimethylbicyclo[3.2.0]hept-2-en-6-one (2) was similarly reduced using the 3α,20β-hydroxysteroid dehydrogenase from Streptomyces while furnished both 6S-alcohols (4a), (6b) with high optical purity.