Convergent Syntheses of 3,6-Dihydroxydec-4-enolides
作者:Jonathan C. Killen、Lorraine C. Axford、Sarah E. Newberry、Thomas J. Simpson、Christine L. Willis
DOI:10.1021/ol3018566
日期:2012.8.17
The total syntheses of the 3,6-dihydroxydecanolide from Cordyceps militaris and the novel C-3 epimer are reported using a diastereoselective Nozaki–Hiyama–Kishi reaction in the key cyclization to generate the 6R stereocenter.
The reaction of primary, secondary, allylic and benzylic trityl ethers with indium powder in MeOH/NH4Cl led to reductive cleavage of the trityl-oxygen bond, affording the corresponding alcohols in good to excellent yield under very mild reaction conditions. The detritylation process could successfully be extended to mono and detritylated diols. This methodology represents a new and efficient detritylation
1,n-Diols (n = 2 - 5) and 2-hydroxy aldehydes protected with a steric auxiliary are transformed by Pseudomonas lipases with high enantioselectivity, thus allowing the efficient resolution of these molecules and the synthesis of related derivatives with high optical purity.