Synthesis of Phosphatidylinositol 3-Kinase (PI3K) Inhibitory Analogues of the Sponge Meroterpenoid Liphagal
作者:Alban R. Pereira、Wendy K. Strangman、Frederic Marion、Larry Feldberg、Deborah Roll、Robert Mallon、Irwin Hollander、Raymond J. Andersen
DOI:10.1021/jm100531u
日期:2010.12.23
Analogues of the spongemeroterpenoid liphagal (1) have been synthesized and evaluated for inhibition of PI3Kα and PI3Kγ as part of a program aimed at developing new isoform-selective PI3K inhibitors. One of the analogues, compound 24, with IC50 values of 66 nM against PI3Kα and 1840 nM against PI3Kγ, representing a 27-fold preference for PI3Kα, exhibited enhanced chemical stability and modestly enhanced
A Catalytic Antibody against a Tocopherol Cyclase Inhibitor
作者:Roman Manetsch、Lei Zheng、Martine T. Reymond、Wolf-Dietrich Woggon、Jean-Louis Reymond
DOI:10.1002/chem.200305629
日期:2004.5.17
ammonium cation 5 and its guanidinium analogue 4 are inhibitors of tocopherolcyclase. Monoclonal antibodies were raised against protein conjugates of the haptens 1-3 and screened for catalytic reactions with alkene 8, a short chain analogue of the natural substrate phytyl-hydroquinone 6, and its enol ether analogues 10a,b. Antibody 16E7 raised against hapten 3 was found to catalyze the hydrolysis of Z
7-MEMBERED FUSED HETEROCYCLES AND METHODS OF THEIR SYNTHESIS
申请人:Northwestern University
公开号:US20150065703A1
公开(公告)日:2015-03-05
Disclosed are a new method for synthesizing 7-membered fused heterocycles and compounds synthesized by the new method. The method involves a dual activation strategy using an N-heterocyclic carbene catalyst as a first Lewis base and another second Lewis base. Compounds synthesized by the disclosed method may include new benzoxopinone compounds, as well as benzoxepane compounds and benzoazepinone compounds that optionally may be derived from the disclosed benzoxopinone compounds.
Enantioselective Copper-Catalyzed Intramolecular Phenolic OH Bond Insertion: Synthesis of Chiral 2-Carboxy Dihydrobenzofurans, Dihydrobenzopyrans, and Tetrahydrobenzooxepines
Efficient: A copper‐catalyzed enantioselective intramolecular insertion of carbenoids into phenolic OHbonds has been developed. This method can be used for the synthesis of the title compounds in high yields and excellent enantioselectivities under mild and neutral conditions (see scheme). NaBArF=sodium tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate.
有效:一个铜催化卡宾成酚类的O对映选择性分子内插入 H键已经研制成功。该方法可用于在温和和中性条件下以高收率和出色的对映选择性合成标题化合物(参见方案)。NaBAr F =四[3,5-双(三氟甲基)苯基]硼酸钠。
A Dual Lewis Base Activation Strategy for Enantioselective Carbene-Catalyzed Annulations
作者:Javier Izquierdo、Ane Orue、Karl A. Scheidt
DOI:10.1021/ja405833m
日期:2013.7.24
activation strategy integrating N-heterocycliccarbene (NHC) catalysis and a second Lewis base has been developed. NHC-bound homoenolate equivalents derived from α,β-unsaturated aldehydes combine with transient reactive o-quinone methides in an enantioselective formal [4 + 3] fashion to access 2-benzoxopinones. The overall approach provides a general blueprint for the integration of carbenecatalysis with