Isobenzofurans as Synthetic Intermediates: Synthesis and Biological Activity of 8‐
<i>epi</i>
‐(–)‐Ajudazol B
作者:Liam Adair、Ben A. Egan、Colin M. Pearson、Ricardo Lopez‐Gonzalez、Michal Kuchar、Artemio Mendoza‐Mendoza、Joëlle Prunet、Rodolfo Marquez
DOI:10.1002/ejoc.202001216
日期:2020.11.15
The step‐economic convergent total synthesis of 8‐epi‐(–)‐ajudazol B has been achieved taking advantage of isobenzofuran as synthetic intermediates. This approach proves the synthetic utility of isobenzofurans as reactive intermediates and provides a fast and efficient way to generate ajudazol analogues with anti‐fungal activity through minimal manipulation.
theranostics for diseases accompanied by pathological function of proteins involved in choline transport. Unlike choline analogues labeled with 11C or 18F that are currently used in the clinic, the iodinated compounds described herein are applicable in positron emission tomography, single-photon emission computed tomography, and potentially in therapy, depending on the iodine isotope selection. Moreover
Intramolecular Silicon-Assisted Cross-Coupling Reactions: General Synthesis of Medium-Sized Rings Containing a 1,3-<i>cis</i>-<i>cis</i> Diene Unit
作者:Scott E. Denmark、Shyh-Ming Yang
DOI:10.1021/ja0178158
日期:2002.3.1
and Pd-catalyzed, silicon-assisted intramolecular cross-coupling has been developed to provide an effective and powerfulmethod for construction of medium-sized rings with an internal 1,3-cis-cis diene unit. Allylic alcohols bearing a Z-iodoalkenyl tether can be silylated with chlorodimethylvinylsilane and subjected to Mo-catalyzed ring-closing metathesis to form unsaturated siloxanes. Activation of
A generalstrategytoward the total synthesis of biologically important C17 polyacetylenes family such as virols A and C has been developed, which employed the (R, R)-ProPhenol/Zn complex-catalyzed highly stereoselective direct addition of propiolate to aliphatic aldehydes as the key step for constructing chiral (S)-alkynol units. Besides, chiral alkynol units in other C17 polyacetylenes were also
C17-polyacetylenic alcohols of the toxic plant, Cicuta virosa, virols A (1), B (2), and C (3) were synthesized by stereoselective routes to confirm their stereochemistry and to obtain supply of these compounds for pharmacological study. The syntheses used chiral 3-hydroxy-1-alkyne building blocks, Pd(0)-CuI(I)-catalyzed coupling of acetylene with vinyl chloride, and heterocoupling reaction of acetylene mediated