A practical enantioselective synthesis of (S)-3-hydroxytetradecanoic acid
作者:Keisuke Matsuyama、Masaya Ikunaka
DOI:10.1016/s0957-4166(99)00290-6
日期:1999.7
(S)-3-Hydroxytetradecanoic acid 1 has been synthesized in an overall yield of 27% from (S)-epichlorohydrin 2 as follows: (1) regio and chemoselective epoxide opening of 2 with a Grignard reagent under the catalysis by Cu(I) followed by consecutive epoxide formation; (2) regioselective epoxide opening of (S)1,2-epoxytridecane 4 with cyanide anion under pH controlled conditions followed by consecutive nitrile hydrolysis with alkaline H2O2 gave crude 1; (3) its purification via the N,N-dicyclohexylammonium salt 6. The method thus devised is practical and scalable for the industrial production of 1. (C) 1999 Elsevier Science Ltd. All rights reserved.
Synthesis and biological investigation of the β-thiolactone and β-lactam analogs of tetrahydrolipstatin
The synthesis of β-thiolactone and β-lactam analogs of tetrahydrolipstatin is described from a common late-stage β-lactone derivative. These analogs, and a cis-disubstituted β-lactone analog of tetrahydrolipstatin, were screened for activity against porcine pancreatic lipase and for inhibition of cell growth of a panel of four human cancer lines.
Total Synthesis of Tetrahydrolipstatin, Its Derivatives, and Evaluation of Their Ability to Potentiate Multiple Antibiotic Classes against <i>Mycobacterium</i> Species
作者:Saniya S. Khan、Thanuja D. Sudasinghe、Alexander D. Landgraf、Donald R. Ronning、Steven J. Sucheck