A new approach to the synthesis of cross-conjugated cyclopentenone prostaglandins. Synthesis of (±)-15-deoxy-Δ12,14-prostaglandin J2 methyl ester
作者:N.S. Vostrikov、I.F. Lobko、M.S. Miftakhov
DOI:10.1016/j.tetlet.2014.08.096
日期:2014.10
A new approach to 15-deoxy-Δ12,14-prostaglandin J2 and related structures based on the (±)-Corey lactone diol has been developed. The key stage of this approach involves building the structure of a prostaglandin (PG) derivative with leaving groups at positions 9, 13, and 15, followed by elimination of these groups by treatment with an organic base.
Total Synthesis of Prostaglandin F2.ALPHA. Using Nickel-Catalyzed Stereoselective Cyclization of 1,3-Diene and Tethered Aldehyde via Transmetalation of Nickelacycle with Diisobutylaluminum Acetylacetonate.
作者:Yoshihiro SATO、Masanori TAKIMOTO、Miwako MORI
DOI:10.1248/cpb.48.1753
日期:——
Total synthesis of prostaglandin F2alpha utilizing a nickel(0)-catalyzed cyclization of 1,3-diene and tethered aldehyde was achieved. The cyclization proceeded via a transmetalation of nickelacycle with diisobutylaluminum acetylacetonate (iBu2-ALAC). Thus, the reaction of 19, having a side chain corresponding to the alpha-chain in PGF2alpha with Ni(cod)2 (10 mol %), PPh3 (20 mol %), and 1,3-cyclohexadiene
Synthesis of (±)-15-deoxy-Δ12,14-prostaglandin J2 and Δ12-prostaglandin J2 15-acetate methyl esters
作者:N. S. Vostrikov、I. F. Lobko、D. U. Ishimova、M. S. Miftakhov
DOI:10.1134/s1070428015010017
日期:2015.1
A new synthetic approach to 15-deoxy-Delta(12,14)-prostaglandin J(2) and related compounds starting from Corey (+/-)-lactone diol has been developed. The key stage of this approach includes synthesis of a prostaglandin derivative possessing leaving groups in positions 9, 13, and 15 and their subsequent elimination by the action of an organic base.
Prostaglandin analogs possessing antinidatory effects. 2. Modification of the .alpha. chain
Additional double bonds were introduced into the alpha chain in 16-phenoxy-, 16-(3-chlorophenoxy)-, 16-[3-(tri-fluoromethyl)phenoxy]-, and 16-(4-chlorophenoxy)-17,18,19,20-tetranorprostaglandins which have antinidatory effects. Of these analogues, the delta 3-cis-delta 5 analogues 23b is 1200 times more potent than prostaglandin F2 alpha in antinidatory effect in the rat and more potent than any other known prostaglandin analogues.