An efficient stereocontrolled synthesis of apoptolidinone A, the aglycone of apoptolidin A is described. The synthetic strategy relies on a cross coupling between C11/C12 of a northern half (C1-C11) and a southern part (C12-C28) followed by a ring-size selective macrolactonization. Key steps for the introduction of the southern half stereocenters are a stereoselective aldol reaction, a substrate controlled
A convenient reagent for aldehyde to alkyne homologation
作者:Douglass F. Taber、Sha Bai、Peng-fei Guo
DOI:10.1016/j.tetlet.2008.09.114
日期:2008.11
A convenient reagent for the one-carbon homologation of an aldehyde to the corresponding alkyne is reported. This reagent allows this conversion to conveniently be carried out on a large scale under ambient conditions. (c) 2008 Elsevier Ltd. All rights reserved.