Efficient Synthesis of (+)-Kalafungin and (-)-Nanaomycin D by Asymmetric Dihydroxylation, Oxa-Pictet-Spengler Cyclization, and H2SO4-Mediated Isomerization
A Dötz benzannulation route to the enantioselective synthesis of (−)- and (+)-juglomycin A
摘要:
Two synthetic routes based on a Dotz benzannulation toward the enantioselective synthesis of naphthoquinone antibiotics (-)- and (+)-juglomycin A are described. The stereoinducing step is based on asymmetric dihydroxylation. The syntheses are completed in seven to eight steps from Fischer carbene 12. (C) 2011 Elsevier Ltd. All rights reserved.
PYRANONAPHTHOQUINONE COMPOUNDS AND METHODS OF USE THEREOF
申请人:University of Kentucky Research Foundation
公开号:US20180055816A1
公开(公告)日:2018-03-01
Provided herein are pyranonaphthoquinone compounds and methods of using pyranonaphthoquinone compounds. The method of using the pyranonaphthoquinone compounds includes selectively inhibiting 4E-BP1 phosphorylation by administering at least one pyranonaphthoquinone or pyranonaphthoquinone analog to a subject in need thereof. The pyranonaphthoquinone compounds includes a structure according to Formula I:
A highly enantioselective synthesis of (−)- and (+)-juglomycin A through Dötz annulation and asymmetric dihydroxylation
作者:Rodney A. Fernandes、Vijay P. Chavan
DOI:10.1016/j.tetlet.2008.04.059
日期:2008.6
A highlyenantioselectivesynthesis of (−)- and (+)-juglomycin A, a quinone antibiotic is described. The synthesis is completed in eight steps, and 19% overall yield and in a high enantioselectivity of 99.5% [for (−)-juglomycin A] and 98.5% [for (+)-juglomycin A]. The synthetic strategy features an efficient combination of the Dötz annulation reaction and asymmetricdihydroxylation as the keys steps
The syntheses of (±)-juglomycin A and (±)-juglomycin B, racemates of two isomeric naturally occurring naphthoquinonoid antibiotics
作者:Robin G. F. Giles、Peter R. K. Mitchell、Gregory H. P. Roos、Jacobus M. M. Strümpfer
DOI:10.1039/p19810002091
日期:——
Syntheses of the diastereoisomeric 5-hydroxy-2-(4′-hydroxy-γ-butyrolacton-5′-yl)-1,4-naphthoquinones (1) and (2) and their 5-deoxy-analogues (3) and (4) are described. The stereochemistries of the latter, being defined through unambiguous synthesis, permit the assignment of the configurations of (1) and (2)(which were obtained from a single precursor) and also those of the natural products, juglomycins