describes the determination of the absoluteconfigurations of the guadinomines, which are novel cyclic guanidyl natural products that are inhibitors of the type III secretion system (TTSS) of bacteria. Any compound that interrupts the TTSS of bacteria is potentially an ideal anti-infectious drug. The reliable asymmetricsynthesis of guadinomines has revealed their absoluteconfigurations, which could
Total synthesis of aspergillide B and structural discrepancy of aspergillide A
作者:Sudhir M. Hande、Jun’ichi Uenishi
DOI:10.1016/j.tetlet.2008.10.115
日期:2009.1
Fourteen-membered cytotoxicmacrolides 1 and 2 were synthesized from alcohol 10 in 15 steps utilizing stereospecific Pd(II)-catalyzed cyclization of ζ-hydroxy chiral allylic alcohol 7. Aspergillides A and B were isolated from marine fungus, and their structures were proposed as 1 and 2, respectively. The synthetic 1 was not matched with aspergillide A but matched with aspergillideB. The chiral center