Design and synthesis of pironetin analogues with simplified structure and study of their interactions with microtubules
摘要:
The preparation preparation of a series of pironetin analogues with simplified structure is described. Their cytotoxic activity and their interactions with tubulin have been investigated. It has been found that, while less active than the parent molecule, the pironetin analogues still share the mechanism of action of the latter and compete for the same binding site to alpha-tubulin. Variations in the configurations of their stereocenters do not translate into relevant differences between biological activities. (C) 2011 Elsevier Masson SAS. All rights reserved.
lene in the presence of a catalytic amount of the Brønstedacido-benzenedisulfonimide under mild conditions to give good yields of the corresponding products. The catalyst can be easily recovered and purified for use in further reactions, which has economic and ecological advantages. homogeneous catalysis - Brønstedacid - Hosomi-Sakurai reaction - acetals - alcohols
Chemistry of organosilicon compounds. 191. Acetalization of carbonyl compounds with alkoxysilanes catalyzed by iodotrimethylsilane. One-pot allylation reactions of carbonyl compounds to homoallyl ethers using an allylsilane
Rhenium complex-catalyzed allylation of acetals with allyltrimethylsilane
作者:Yutaka Nishiyama、Keiko Shimoura、Noboru Sonoda
DOI:10.1016/j.tetlet.2008.09.001
日期:2008.11
It was confirmed that the treatment of acetals with allyltrimethylsilane in the presence of a catalytic amount of the rhenium complex, ReBr(CO)(5), gave the corresponding homoallylic ethers in excellent to good yields. (C) 2008 Elsevier Ltd. All rights reserved.
A novel one-step method for the reductive allylation of esters and the first total synthesis of (±)-erythrococcamide B
作者:Roman Lagoutte、James A. Wilkinson
DOI:10.1016/j.tetlet.2010.10.159
日期:2010.12
A novel and convenient one-step method for the reductive allylation of aliphatic and alicyclic esters using InBr3 as a catalyst is reported. This methodology has also been applied in the first total synthesis of (+/-)-erythrococcamide B. (C) 2010 Elsevier Ltd. All rights reserved.