title: Hemi-phorboxazole a: structure confirmation, analogue design and biological evaluation.
abstract: A synthesis providing totally synthetic (+)-hemi-phorboxazole A (1), proceeding in two steps (85% yield) from known vinyl iodide precursor (+)-2, has been achieved in conjunction with the design, synthesis, and biological evaluation of two hemi-phorboxazole analogues [(+)-3 and (-)-4] featuring ring replacements inscribed within the macrolide. Although hemi-phorboxazole A (1) displayed no activity when tested against Candida albicans and two human cancer cell lines, analogue (-)-4 exhibited significant tumor cell growth inhibitory activity in the nanomolar range against HCT-116 (colon) and SK-BR-3 (breast), while (+)-3 displayed promising antifungal activity against C. albicans.
authors.affiliation: Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. smithab@sas.upenn.edu
authors.forename: Amos B
authors.initials: AB
authors.lastname: Smith
authors.forename: Zhuqing
authors.initials: Z
authors.lastname: Liu
authors.forename: Anne-Marie L
authors.initials: AM
authors.lastname: Hogan
authors.forename: Doralyn S
authors.initials: DS
authors.lastname: Dalisay
authors.forename: Tadeusz F
authors.initials: TF
authors.lastname: Molinski
mesh_terms: D000935:Antifungal Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D006576:Heterocyclic Compounds, 4 or More Rings / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010080:Oxazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013237:Stereoisomerism
chemical_list: D000935:Antifungal Agents; D000970:Antineoplastic Agents; D006576:Heterocyclic Compounds, 4 or More Rings; D010080:Oxazoles; C408887:phorboxazole A