Triflimide: An Overlooked High-Performance Catalyst of the Mukaiyama Aldol Reaction of Silyl Ketene Acetals with Ketones
作者:Han Yong Bae、Benjamin List
DOI:10.1002/chem.201803142
日期:2018.9.18
The Mukaiyamaaldolreaction is a widely applied carbon–carbon bond forming reaction. However, despite numerous well‐established methods using aldehydes as acceptors, only few examples exist with ketones. Here we report a highly practical catalytic approach to this transformation, namely, the triflimide catalyzedMukaiyamaaldolreaction of silyl ketene acetals with ketones. This method exhibits a
Total Synthesis and Structural Revision of the Marine Macrolide Neopeltolide
作者:Daniel W. Custar、Thomas P. Zabawa、Karl A. Scheidt
DOI:10.1021/ja710080q
日期:2008.1.1
The totalsynthesis and structural revision of the marine natural product neopeltolide is reported. The key bond-forming step involves a Lewis acid-catalyzed intramolecular cyclization to install the tetrahydropyran ring and the macrocycle simultaneously. This type of cyclization is the first of its kind and assembles the carbon backbone of the natural product efficiently. The synthesis of the reported
Lewis Base Activation of Lewis Acids: Catalytic, Enantioselective Addition of Silyl Ketene Acetals to Aldehydes
作者:Scott E. Denmark、Gregory L. Beutner、Thomas Wynn、Martin D. Eastgate
DOI:10.1021/ja047339w
日期:2005.3.1
The concept of Lewisbase activation of Lewisacids has been reduced to practice for catalysis of the aldolreaction of silyl ketene acetals and silyl dienol ethers with aldehydes. The weakly acidic species, silicon tetrachloride (SiCl4), can be activated by binding of a strongly Lewis basic chiral phosphoramide, leading to in situ formation of a chiral Lewisacid. This species has proven to be a competent
Assembly of Four Diverse Heterocyclic Libraries Enabled by Prins Cyclization, Au-Catalyzed Enyne Cycloisomerization, and Automated Amide Synthesis
作者:Jiayue Cui、David I. Chai、Christopher Miller、Jason Hao、Christopher Thomas、JingQi Wang、Karl A. Scheidt、Sergey A. Kozmin
DOI:10.1021/jo301061r
日期:2012.9.7
simple one-flask operation starting with readily available amines, ketoesters, and unsaturated anhydrides. The use of tetrahydropyran-containing ketoesters, which were rapidly assembled by our Prinscyclization protocol, enabled efficient fusion of pyran and piperidinone cores. A newly developed Au(I)-catalyzed cycloisomerization of alkyne-containing enamides further expanded heterocyclic diversity by
3-METHYLIDENEOXAN-4-ONE COMPOUNDS AND SUBSTITUTED DERIVATIVES THEREOF AS INHIBITORS OF TELOMERASE
申请人:NORTHWESTERN UNIVERSITY
公开号:US20210070725A1
公开(公告)日:2021-03-11
Disclosed are 3-methylideneoxan-4-one compounds, derivatives thereof, and methods of their synthesis and methods of their use in treating a disease or disorder in a subject in need thereof, such as diseases and disorders that are associated with telomerase activity such as cancer. The disclosed compounds may be formulated in a pharmaceutical composition for treating diseases and disorders that are associated with telomerase activity such as cancer.