Studies of Nucleophile Ring Opening of Oxabicyclic Systems in Highly Polar Media

Download or read book Studies of Nucleophile Ring Opening of Oxabicyclic Systems in Highly Polar Media written by Nhut Kiet Diep and published by . This book was released on 2006 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyketides constitute an important family of natural products, having a broad spectrum of biological activity such as antitumor, antibiotic, antifungal, or immunomodulatory action.1 Many of these compounds possess polypropionates (units with alternating hydroxyl and methyl groups), reflecting their common biosynthesis that is found within nature. Their structural complexity and importance of these compounds as therapeutical agents have made them attractive targets for synthetic organic chemists.1 Excellent chiral propionate reagents have been developed over the years, including many chiral auxiliaries to direct and promote stereoselectivity, but most recent, investigations have focused upon developing metal-catalyzed asymmetric ring opening. To achieve these results, transition metals (Ni, Pd, Pt) have been employed leading to synthetically useful transformations.