General Strategy for the Synthesis of B<sub>1</sub> Phytoprostanes, Dinor Isoprostanes, and Analogs
作者:Annika Schmidt、Wilhelm Boland
DOI:10.1021/jo062359x
日期:2007.3.1
The synthesis of the phytoprostane B1 types I and II is achieved in high overall yield (35−53%) by only two principal transformations starting from 1,3-cyclopentanedione. The first side chain is attached via O-acylation of the 1,3-dione followed by rearrangement and reduction to give the 2-alkyl-1,3-diones 4a−c. After conversion into the corresponding vinylic iodides 5a−c, the second side chain is
General Strategy for the Synthesis of B<sub>1</sub> and L<sub>1</sub> Prostanoids: Synthesis of Phytoprostanes (<i>RS</i>)-9-L<sub>1</sub>-PhytoP, (<i>R</i>)-9-L<sub>1</sub>-PhytoP, (<i>RS</i>)-16-B<sub>1</sub>-PhytoP, and (<i>RS</i>)-16-L<sub>1</sub>-PhytoP
作者:Ruggero Beretta、Mirko Giambelli Gallotti、Umberto Pennè、Alessio Porta、Juan Fernando Gil Romero、Giuseppe Zanoni、Giovanni Vidari
DOI:10.1021/jo502538b
日期:2015.2.6
acceptor properties at carbonsα and β, respectively. Key steps include the chemoselective lithiation of a 1-iodo-2-bromoolefin, the introduction of the side chains by transition-metal catalysis following Heck- or Suzuki-type protocols, the construction of an enone moiety by a mild Au(I)-catalyzed Meyer Schuster rearrangement, and a lipase-mediated hydrolysis of methylesters to deliver the phytoprostanes