Acetoxyfulvene surrended to asymmetric Diels–Alder cycloaddition, paving the way to the development of a unified strategy for the stereodivergent synthesis of both prostaglandins and isoprostanoids. In fact, the cycloadduct was subsequently converted to a common intermediate, which through two different stereoselective pathways afforded the two lactones 1 and 2, which are key building blocks in the
The first syntheses of 9-J1-phytoprostane and 9-A1-phytoprostanemethylester were achieved enantioselectively using a divergent approach from a common intermediate sulfone 4. The divergence was accomplished using a sigmatropic rearrangement (swap protocol) to give sulfone 5 in 47 % overall yield. The two upper side-chains, with a stereodefined E double bond, were installed using consolidated Julia–Lythgoe
1,3-allylic transposition of the C-9 hydroxyl group of compound 13 has allowed the first total synthesis of J(2) isoprostane (1), a recently discovered member of the growing isoprostane family. This elusive compound opens up numerous new avenues for the molecular biology of cyclopentenoneprostaglandins which are endowed of intriguing biological effects such as antitumor, antiinflammatory, and antiviral
A New Approach to the Synthesis of 15-A2tIsoP Isoprostane and 14-A4tNeuroP Neuroprostane
作者:Vladimir V. Veselovsky、Antonina V. Lozanova、Andrei V. Stepanov
DOI:10.1016/j.mencom.2012.09.008
日期:2012.9
A formal synthesis of the title natural cyclopentanoids was implemented based on intramolecular [3+2] cycloaddition in unsaturated silyl nitronates at the key step.
A facile stereoselective synthesis of (3aR*,4R*,6aS*)-4-(hydroxymethyl)- 3,3a,4,6a-tetrahydrocyclopenta[b]furan- 2-one and other useful cyclopentanoid building blocks.