title: Asymmetric total synthesis of paecilomycin E, 10'-epi-paecilomycin E and 6'-epi-cochliomycin C.
abstract: The asymmetric total syntheses of naturally occurring resorcylic acid lactone paecilomycin E and two of its structural congeners have been reported in this article. The major highlight of the synthetic venture is the application of the late stage Mitsunobu macrolactonization method (as it is difficult to achieve the desired products through the standard carboxyl activation method) of a properly functionalized seco-acid. The macrolactonization precursor was synthesized by applying an "E"-selective Julia-Kocienski olefination of a highly functionalized aromatic aldehyde and a sulphone, which constitutes all the stereocenters (C4', C5', C6' and C10'; 3S,7R,8R,9S) in the target molecule.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, India. snanda@chem.iitkgp.ernet.in.
authors.forename: Pratik
authors.initials: P
authors.lastname: Pal
authors.forename: Nandan
authors.initials: N
authors.lastname: Jana
authors.forename: Samik
authors.initials: S
authors.lastname: Nanda
mesh_terms: D062385:Hydroxybenzoates / Q000138:chemical synthesis* / Q000737:chemistry; D007783:Lactones / Q000138:chemical synthesis* / Q000737:chemistry; D018942:Macrolides / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure
chemical_list: C000598278:7,8,9,16-tetrahydroxy-14-methoxy-3-methyl-3,4,5,6,7,8,9,10-octahydro-1H-benzo(c)(1)oxacyclotetradecin-1-one; D062385:Hydroxybenzoates; D007783:Lactones; D018942:Macrolides; C559007:cochliomycin C