期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 28, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202200360
关键词
lipoxins; natural products; neuroinflammation; pro-resolving lipid mediators; total synthesis
资金
- UHN Foundation
- Krembil Foundation
- National Institutes of Health (NIH) [5R01EY030218-03]
- Canadian Institutes of Health Research (CIHR) [PJT166201]
- Canada Foundation for Innovation
- Princess Margaret Cancer Foundation
- Toronto Innovation Acceleration Partners (TIAP) [LAB150]
Two stereocontrolled, efficient, and modular syntheses of eicosanoid lipoxin B4 have been reported. These methods provide high yields and synthetic flexibility, enabling the synthesis of large quantities of lipoxin B4, as well as new analogs and chemical probes.
Two stereocontrolled, efficient, and modular syntheses of eicosanoid lipoxin B4 (LXB4) are reported. One features a stereoselective reduction followed by an asymmetric epoxidation sequence to set the vicinal diol stereocentres. The dienyne was installed via a one-pot Wittig olefination and base-mediated epoxide ring opening cascade. The other approach installed the diol through an asymmetric dihydroxylation reaction followed by a Horner-Wadsworth-Emmons olefination to afford the common dienyne intermediate. Finally, a Sonogashira coupling and an alkyne hydrosilylation/proto-desilylation protocol furnished LXB4 in 25 % overall yield in just 10 steps. For the first time, LXB4 has been fully characterized spectroscopically with its structure confirmed as previously reported. We have demonstrated that the synthesized LXB4 showed similar biological activity to commercial sources in a cellular neuroprotection model. This synthetic route can be employed to synthesize large quantities of LXB4, enable synthesis of new analogs, and chemical probes for receptor and pathway characterization.
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