Short Diastereoselective Synthesis of the C1-C13 (AB Spiroacetal) and C17-C28 Fragments (CD Spiroacetal) of Spongistatin 1 and 2 through Double Chain-Elongation Reactions
作者:Christopher L. Flowers、Pierre Vogel
DOI:10.1002/chem.201002204
日期:2010.12.17
to further the spiroacetals derived from them, which utilizes a bidirectional Hosomi–Sakurai allylation approach around key allylsilanes in the synthesis of the AB and CD ring systems of spongistatin1 and 2, is reported. The synthesis of the ABspiroacetal 9 requires 13 steps, with a longest linear sequence of seven steps in an overall yield of 27 %. The synthesis of the CDspiroacetal 13 requires 15