Synthesis and Cytotoxicity of a Salicylihalamide A Analogue
作者:Shaoshan Tang、Karen L. Erickson
DOI:10.1021/np070694q
日期:2008.5.1
The synthesis of a simple analogue of salicylibalamide A with a truncated lactone ring (2) was achieved in 10 steps. Its cytotoxicity profile in the NCI 60-cell-line human tumor assay differed significantly from that of salicylihalamide A in both level and specificity.
DMP-mediated one-pot oxidative olefination of silyl ethers
作者:Guisheng Deng、Baihua Xu、Chunyu Liu
DOI:10.1016/j.tet.2005.04.021
日期:2005.6
Silyl ethers of arylic, allylic, propargylic and unactivated alcohols could be deprotected and oxidized with Dess-Martin periodinane, and the resulting aldehydes could be directly converted to the corresponding alpha,beta-unsaturated esters in one pot with stabilized phosphoranes. Good selectivities were achieved upon a variety of protecting groups of alcohol by using this method. Other advantages of the protocol included simplicity of operations and high efficiency, as well as good to excellent yields. (c) 2005 Elsevier Ltd. All rights reserved.