TARARA, GERHARD;HOPPE, DIETER, SYNTHESIS,(1989) N, C. 89-92
作者:TARARA, GERHARD、HOPPE, DIETER
DOI:——
日期:——
Total Synthesis of Protected D-<i>altro</i>- and D-<i>galacto</i>-3,6-Dideoxy-3-<i>C</i>-methylhexoses; Key Intermediates of a Rifamycin S Synthesis
作者:Gerhard Tarara、Dieter Hoppe
DOI:10.1055/s-1989-27160
日期:——
Two particular derivatives of the title compound, used in the Kinoshita synthesis of the Rifamycin S ansa chain, were prepared by total synthesis from isobutyl (R)-lactate. The best conditions were worked out for the inversion of the 2-hydroxy group in the appropriate α-D-allo- and β-D-talofuranosides, readily available with few steps from (R)-2-benzyloxypropanal by the homoaldol reaction, with an α-metalated (E)-2-butenyl carbamate.