23668-11-3Relevant articles and documents
Preparation and biological evaluation of synthetic and polymer-encapsulated congeners of the antitumor agent pactamycin: Insight into functional group effects and biological activity
Sharpe, Robert J.,Malinowski, Justin T.,Sorana, Federico,Luft, J. Christopher,Bowerman, Charles J.,Desimone, Joseph M.,Johnson, Jeffrey S.
supporting information, p. 1849 - 1857 (2015/03/30)
The synthesis and biological analysis of a number of novel congeners of the aminocyclopentitol pactamycin is described. Specific attention was paid to the preparation of derivatives at crucial synthetic branch points of the parent structure, and biological assays revealed a number of insights into the source of pactamycin's biological activity. Additionally, the encapsulation of pactamycin and select derivatives into the PRINT
Asymmetric synthesis of the aminocyclitol pactamycin, a universal translocation inhibitor
Sharpe, Robert J.,Malinowski, Justin T.,Johnson, Jeffrey S.
, p. 17990 - 17998 (2014/01/06)
An asymmetric total synthesis of the aminocyclopentitol pactamycin is described. The title compound is delivered in 15 steps from 2,4-pentanedione. Critical to this approach was the exploitation of a complex symmetry-breaking reduction strategy to assemble the C1, C2, and C7 relative stereochemistry within the first four steps of the synthesis. Multiple iterations of this reduction strategy are described, and a thorough analysis of stereochemical outcomes is detailed. In the final case, an asymmetric Mannich reaction was developed to install a protected amine directly at the C2 position. Symmetry-breaking reduction of this material gave way to a remarkable series of stereochemical outcomes leading to the title compound without recourse to nonstrategic downstream manipulations. This synthesis is immediately accommodating to the preparation of structural analogs.
Total synthesis of pactamycin and pactamycate: A detailed account
Hanessian, Stephen,Vakiti, Ramkrishna Reddy,Dorich, Stéphane,Banerjee, Shyamapada,Deschênes-Simard, Beno?t
, p. 9458 - 9472 (2013/01/15)
This article describes synthetic studies that culminated in the first total synthesis of pactamycin and pactamycate and, in parallel, the two known congeners, de-6-MSA-pactamycin and de-6-MSA-pactamycate, lacking the 6-methylsalicylyl moiety. Starting with l-threonine as a chiron, a series of stereocontrolled condensations led to a key cyclopentenone harboring a spirocyclic oxazoline. A series of systematic functionalizations led initially to the incorrect cyclopentanone epoxide, which was "inverted" under solvolytic conditions. Installation of the remaining groups and manipulation of the oxazoline eventually led to pactamycin, pactamycate, and their desalicylyl analogues.