Synthesis of 7-Deoxypancratistatin from Carbohydrates by the Use of Olefin Metathesis
作者:Anders E. Håkansson、Anders Palmelund、Henriette Holm、Robert Madsen
DOI:10.1002/chem.200501429
日期:2006.4.12
stereocontrolled synthesis of (+)-7-deoxypancratistatin is described. The convergent synthesis has been achieved by two different strategies, both of which commence from a pentose and piperonal. The latter is converted into allylic bromide 7, which is then coupled with a protected methyl 5-deoxy-5-iodo-D-ribofuranoside in the presence of zinc metal. The first strategy involves a total of only 13 steps from D-ribose