title: Stereocontrolled synthesis of a complex library via elaboration of angular epoxyquinol scaffolds.
abstract: We have accomplished the synthesis of a complex chemical library via elaboration of angular epoxyquinol scaffolds with distinct skeletal frameworks. The key strategy involves highly stereocontrolled [4 + 2] Diels-Alder cycloadditions of chiral, nonracemic epoxyquinol dienes to generate the scaffolds. Further scaffold diversification involves hydrogenation, epimerization, dehydration, and condensation of the carbonyl group with alkoxyamine and carbazate building blocks. Further elaboration of the scaffolds also provided new skeletal frameworks using hydroxyl-directed Diels-Alder cycloaddition and reductive N-N bond cleavage. The overall process afforded 244 highly complex and functionalized compounds. Preliminary biological screening of the library uncovered six compounds which showed significant inhibition of Hsp 72 induction.
authors.affiliation: Department of Chemistry and Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Lei
authors.forename: Nava
authors.initials: N
authors.lastname: Zaarur
authors.forename: Michael Y
authors.initials: MY
authors.lastname: Sherman
authors.forename: John A
authors.initials: JA
authors.lastname: Porco
mesh_terms: D004353:Drug Evaluation, Preclinical / Q000295:instrumentation* / Q000379:methods*; D004852:Epoxy Compounds / Q000138:chemical synthesis* / Q000737:chemistry* / Q000494:pharmacology; D050884:HSP72 Heat-Shock Proteins; D006360:Heat-Shock Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D006873:Hydroquinones / Q000138:chemical synthesis* / Q000737:chemistry* / Q000494:pharmacology; D006900:Hydroxylation; D008301:Maleimides / Q000737:chemistry; D015394:Molecular Structure; D011522:Protons; D013237:Stereoisomerism; D014230:Triazoles / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D004852:Epoxy Compounds; D050884:HSP72 Heat-Shock Proteins; D006360:Heat-Shock Proteins; D006873:Hydroquinones; D008301:Maleimides; D011522:Protons; D014230:Triazoles; C043592:maleimide; C421465:urazole