Efficient and Scalable Synthesis of Bardoxolone Methyl (CDDO-methyl Ester)
摘要:
Bardoxolone methyl (2-cyano-3,12-dioxooleane-1,9(11)-dien-28-oic acid methyl ester; CDDO-Me) (1), a synthetic oleanane triterpenoid with highly potent anti-inflammatory activity (levels below 1 nM), has completed a successful phase I clinical trial for the treatment of cancer and a successful phase II trial for the treatment of chronic kidney disease in type 2 diabetes patients. Our synthesis of bardoxolone methyl (1) proceeds In similar to 50% overall yield In five steps from oleanolic acid (2), requires only one to two chromatographic purifications, and can provide gram quantities of 1.