660430-03-5Relevant academic research and scientific papers
Synthesis of the 16S,17S-Epoxyprotectin Intermediate in the Biosynthesis of Protectins by Human Macrophages
Aursnes, Marius,Tungen, J?rn E.,Colas, Romain A.,Vlasakov, Iliyan,Dalli, Jesmond,Serhan, Charles N.,Hansen, Trond V.
, p. 2924 - 2931 (2015)
The n-3 polyunsaturated fatty acids act as substrates during the resolution phase of acute inflammation for the biosynthesis of specialized pro-resolving lipid mediators. One premier example is the C22-dihydroxy-polyunsaturated fatty acid protectin D1 (1). The human 15-lipoxygenase type I, via stereoselective processes and with docosahexaenoic acid as the substrate, enables the formation of this specialized pro-resolving lipid mediator. Herein, based on results from LC/MS-MS metabololipidomics, support is presented for the apprehended biosynthesis of 1 in human macrophages occurring via the intermediate 16S,17S-epoxyprotectin (5). Stereochemically pure 5 was obtained using the Katsuki-Sharpless epoxidation protocol, establishing the chirality at the C16 and C17 atoms, one Z-selective reduction, and E- and Z-stereoselective Wittig reactions. In addition, information on the nonenzymatic aqueous hydrolysis products and the half-life of 16S,17S-epoxyprotectin (5) is presented.
Total synthesis of the potent anti-inflammatory lipid mediator Protectin D1
Rodriguez, Ana R.,Spur, Bernd W.
, p. 6011 - 6015 (2014/12/11)
The total synthesis of the potent anti-inflammatory lipid mediator Protectin D1 derived from docosahexaenoic acid, has been achieved. The chiral hydroxy-groups at C10 and C17 were obtained via a chiral pool strategy from (4R)-4-(2-hydroxyethyl)-2,2-dimethyl-1,3-dioxolane and 3,4-O-isopropylidene-2-deoxy-d-ribose, respectively. Wittig reactions, Takai olefination, Pd0/CuISonogashira coupling, and Zn(Cu/Ag) reduction completed the total synthesis of Protectin D1.
Stereoselective synthesis of protectin D1: A potent anti-inflammatory and proresolving lipid mediator
Aursnes,Tungen,Vik,Dalli,Hansen
, p. 432 - 437 (2014/01/06)
A convergent stereoselective synthesis of the potent anti-inflammatory, proresolving and neuroprotective lipid mediator protectin D1 (2) has been achieved in 15% yield over eight steps. The key features were a stereocontrolled Evans-aldol reaction with Nagao's chiral auxiliary and a highly selective Lindlar reduction of internal alkyne 23, allowing the sensitive conjugated E,E,Z-triene to be introduced late in the preparation of 2. The UV and LC/MS-MS data of synthetic protectin D1 (2) matched those obtained from endogenously produced material.
Total synthesis of the antiinflammatory and proresolving protectin D1
Ogawa, Narihito,Kobayashi, Yuichi
, p. 3001 - 3004 (2011/06/23)
Stereoselective total synthesis of protectin D1 was completed through construction of the Z,E,E-triene structure by using the Suzuki coupling between the vinyl borane (C13-C22) and the vinyl iodide (C1-C12). The Z-enyne, the acetylene precursor of the vinyl borane was synthesized from optically active γ-TMS allylic alcohol in a straightforward way. On the other hand, the vinyl iodide was prepared by using Wittig reaction between the C8-C12 aldehyde possessing the requisite iodo-olefin moiety and the C1-C7 phosphonium iodide.
