Palladium-Catalyzed Allylic Alkylation of Carboxylic Acid Derivatives: N-Acyloxazolinones as Ester Enolate Equivalents
作者:Barry M. Trost、David J. Michaelis、Julie Charpentier、Jiayi Xu
DOI:10.1002/anie.201105801
日期:2012.1.2
Triple A: A general asymmetric allylicalkylation of ester enolate equivalents at the carboxylicacid oxidation state is reported. N‐Acylbenzoxazolinone‐derived enol carbonates were synthesized and employed in the palladium‐catalyzed alkylation reaction. The imide products were readily converted into a series of carboxylicacid derivatives without loss of enantiopurity.
The study of classical ring-closing metathesis and relay ring-closing metathesis in a total synthesis of Jasplakinolide and its desbromo analog is described.
本文描述了在Jasplakinolide及其去溴类比物的 total synthesis 中,经典环闭重排反应和中继环闭重排反应的研究。
Selective imaging of actin in live native cells
申请人:Max-Planck-Gesellschaft zur Förderung der
Wissenschaften e.V.
公开号:EP2594290A1
公开(公告)日:2013-05-22
The present invention provides cyclodepsipeptidic compounds, which selectively bind to actin structures, their manufacture and their use as probes for imaging and targeting actin structures, particularly in living cells.
Cell-permeable photoswitchable small molecules, termed optojasps, are introduced to optically control the dynamics of the actin cytoskeleton and cellular functions that depend on it. These light-dependent effectors were designed from the F-actin-stabilizing marine depsipeptide jasplakinolide by functionalizing them with azobenzene photoswitches. As demonstrated, optojasps can be employed to control cell viability, cell motility, and cytoskeletal signaling with the high spatial and temporal resolution that light affords. Optojasps can be expected to find applications in diverse areas of cell biological research. They may also provide a template for photopharmacology targeting the ubiquitous actin cytoskeleton with precision control in the micrometer range.