2012
DOI: 10.1021/ol301783p
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Total Synthesis of (−)-Irciniastatin B and Structural Confirmation via Chemical Conversion to (+)-Irciniastatin A (Psymberin)

Abstract: The total synthesis and structural confirmation of the marine sponge cytotoxin (−)-irciniastatin B has been achieved via a unified strategy employing a late-stage, selective deprotection/oxidation sequence that provides access to both (+)-irciniastatin A (psymberin) and (−)-irciniastatin B.

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Cited by 20 publications
(16 citation statements)
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“…571 The total synthesis of (À)-irciniastatin B (Ircinia ramosa) 572 has been achieved. 573 The accepted structure of cyclocinamide A (Psammocinia sp. ), originally reported in 1997 and revised in 2008, 574,575 has been disproven by synthesis leaving the structure of the natural product as a mystery.…”
Section: Spongesmentioning
confidence: 99%
“…571 The total synthesis of (À)-irciniastatin B (Ircinia ramosa) 572 has been achieved. 573 The accepted structure of cyclocinamide A (Psammocinia sp. ), originally reported in 1997 and revised in 2008, 574,575 has been disproven by synthesis leaving the structure of the natural product as a mystery.…”
Section: Spongesmentioning
confidence: 99%
“…Kürzlich wurde die erste Totalsynthese von Irciniastatin B ( 4 ) von der Smith‐Arbeitsgruppe veröffentlicht (Schema ) 94. Dabei verwendeten sie die gleiche Strategie, die sie zuvor für die Synthese von Psymberin ( 3 ) genutzt hatten, und passten diese hinsichtlich der verwendeten Schutzgruppen am Dihydroisocumarin an (DMB vs. SEM).…”
Section: Kupplungsreaktionen Und Totalsynthesenunclassified
“…Seit seiner Isolation gibt es zwar eine Vielzahl von Syntheseansätzen zum Aufbau des Psymberins ( 3 ), erstaunlicherweise war jedoch bis 2012 keine Synthese des strukturell sehr ähnlichen, ebenfalls biologisch hochaktiven Irciniastatin B ( 4 ) bekannt. Basierend auf ihrer Totalsynthese des Psymberins ( 3 ) konnte die Smith‐Gruppe Irciniastatin B ( 4 ) durch geringe Abwandlung der Strategie synthetisieren 94. Irciniastatin B ( 4 ) inhibiert stärker das Wachstum von Bauchspeicheldrüse‐ und Brustkrebszellen sowie Zellen des zentralen Nervensystems (Tabelle 6).…”
Section: Analoga Und Ihre Biologischen Eigenschaftenunclassified
“…In addition, to probe the SAR at C(11) of the native irciniastatin structure, we also undertook manipulation of several late-stage intermediates reported earlier in our total synthesis of (−)-irciniastatin B ( 2 ) ( Figure 3 ). 18 We envision that such analogues would add further insights to the SAR of the tetrahydropyran core and in turn provide direction for the future design of accessible, potentially potent irciniastatin analogues.…”
Section: Introductionmentioning
confidence: 99%