The present invention provides compounds, pharmaceutically acceptable compositions thereof, and methods of using the same.
本发明提供了化合物、药学上可接受的组合物以及使用它们的方法。
Synthesis and inhibitory action on HMG-CoA synthase of racemic and optically active oxetan-2-ones (β-Lactones)
作者:Daniel Romo、Paul H.M. Harrison、Stephen I. Jenkins、R.William Riddoch、Kaapjoo Park、Hong Woon Yang、Cunxiang Zhao、Gerard D. Wright
DOI:10.1016/s0968-0896(98)00114-x
日期:1998.8
but variable enantioselectivity (22-85% ee). In in vitro assays using both native and recombinant HMG-CoA synthase from Saccharomyces cerevisiae, oxetan-2-ones mono-substituted at C4 with linear alkyl chains gave IC50s that decreased monotonically with chain length up to 10 carbons and then rose rapidly for longer chains. The transisomers of 3-methyl-4-alkyl-oxetan-2-ones showed a similar trend but had
Practical Enantioselective Synthesis of β-Lactones Catalyzed by Aluminum Bissulfonamide Complexes
作者:Thomas Kull、René Peters
DOI:10.1002/adsc.200700084
日期:2007.7.2
practical aluminum-bissulfonamide complex catalyzed enantioselective formation of β-lactones by [2+2] cycloaddition of ketene (generated in situ from acetyl bromide by dehydrobromination) with various α-unbranched and -branched aliphatic aldehydes is presented. The methodology offers the advantage of operational simplicity not only as the ligand synthesis requires just a single sulfonylation step from commercially
Studies of the tandem Mukaiyama aldol-lactonization (TMAL) reaction: A concise and highly diastereoselective route to β-lactones applied to the total synthesis of the potent pancreatic lipase inhibitor, (−)-Panclicin D
作者:Hong Woon Yang、Cunxiang Zhao、Daniel Romo
DOI:10.1016/s0040-4020(97)01029-6
日期:1997.12
A concise and highly diastereoselective route to β-lactones has been developed based on a tandemMukaiyamaaldol-lactonization employing thiopyridylsilylketene acetals and various aldehydes. (−)-Panclicin D, a potent pancreatic lipase inhibitor, was synthesized using this methodology. Recent optimization and extensions of this method are described which include variation of the silyl group and leaving
Chromium(III) Octaethylporphyrinato Tetracarbonylcobaltate: A Highly Active, Selective, and Versatile Catalyst for Epoxide Carbonylation
作者:Joseph A. R. Schmidt、Emil B. Lobkovsky、Geoffrey W. Coates
DOI:10.1021/ja051874u
日期:2005.8.1
of a tetracarbonylcobaltate anion and an octahedral chromium porphyrin complex axially ligated by two THF ligands. Regarding the carbonylation of epoxides to beta-lactones, catalyst 1 exhibits excellent turnover numbers (up to 10,000) and turnover frequencies (up to 1670 h(-1)), with regioselective carbonyl insertion occurring between the oxygen and the sterically less hindered carbon of the epoxide