title: A convergent total synthesis of the potent cephalostatin/ritterazine hybrid -25-epi ritterostatin GN1N.
abstract: The convergent synthesis of 25-epi ritterostatin GN1N is described for the first time, starting from hecogenin acetate (HA). Stereoselective dihydroxylation employing the chiral ligand (DHQ)2PHAL was used as the key step to introduce the C25 epi-stereocenter on the north 1 segment. The title compound was obtained through a coupling reaction between the C3-keto-azide (cstat North 1) and North G.
authors.affiliation: Department of Chemistry, Purdue University , West Lafayette, Indiana 47907, United States.
authors.forename: Ananda Kumar
authors.initials: AK
authors.lastname: Kanduluru
authors.forename: Prabal
authors.initials: P
authors.lastname: Banerjee
authors.forename: John A
authors.initials: JA
authors.lastname: Beutler
authors.forename: Philip L
authors.initials: PL
authors.lastname: Fuchs
mesh_terms: D018360:Crystallography, X-Ray; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D013141:Spiro Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D013256:Steroids / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: C586599:25-epi ritterostatin GN1N; D008024:Ligands; D013141:Spiro Compounds; D013256:Steroids
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