A new route to the optically active allyl alcohols by microbial oxidation is disclosed. Yamadazyma farinosa IFO 10896, a yeast, efficiently catalyzes the enantioselective oxidation of allyl alcohols to afford the corresponding optically active alcohols as the remaining substrates. This reaction is applicable to both cyclic and acyclic compounds.
A Practical Synthesis of Several Polyhydroxylated Chiral Building Blocks
作者:Masato Kusakabe、Hiroshi Kato、Fumie Sato
DOI:10.1246/cl.1987.2163
日期:1987.11.5
A practical method for the synthesis of several useful polyhydroxylatedchiralbuildingblocks has been developed. The key reaction is the kinetic resolution of (E)-1-trimethylsilyl-4-alkoxy-1-buten-3-ol or (E)-1-trimethylsilyl-5-alkoxy-1-penten-3-ol using the Sharpless asymmetric epoxidation reaction.
Stereoselective synthesis of (+)-sordidin, the male-produced aggregation pheromone of the banana weevil Cosmopolites sordidus
作者:J.S. Yadav、K. Bhaskar Reddy、A.R. Prasad、H. Ur Rehman
DOI:10.1016/j.tet.2007.12.051
日期:2008.2
Stereoselective synthesis of (1S,3R,5R,7S)-(+)-sordidin, the natural male-produced aggregationpheromone of the banana weevil Cosmopolites sordidus (Germar) starting from 5-benzyloxy-(2E)-pentene-1-ol is described. The key transformations employed in the synthesis are Sharpless asymmetric epoxidation, Ueno–Stork cyclization, and Jacobsen kinetic resolution.
Campechic acids A and B are anti-invasive polyketide antibiotics isolated from Streptomyces sp. CHI93 strain. Herein we describe stereoselective synthesis of the C-16–C-30 fragment of campechic acids A and B via a biosynthesis-inspired epoxide-opening cascade and its NMR spectroscopic comparison with the authentic degradation product, resulting in configurational assignment of the C-21, C-24, C-25
A novel strategy for the chiral 2,4,5-triol moiety and its application to the synthesis of seimatopolide A and (2S,3R,5S)-(−)-2,3-dihydroxytetradecan-5-olide
A highly stereoselective approach to the total synthesis of seimatopolide A and (25,3R,5S)-(-)-2,3-dihydroxytetradecan-5-olide is described via a common polyketide precursor by means of Prins reaction and MacMillan aminoxylation sequence. (C) 2012 Elsevier Ltd. All rights reserved.