Herein, we report on the highly efficient and practicalsynthesis of 2,3-dihydroquinazolinones directly from diverse aldehydes with excellent yields and enantioselectivity. Particularly, this protocol affords better enantiocontrol for aliphatic aldehydes (up to 99% yield, 97% ee), which always gave unsatisfactory results in the previous studies. Moreover, this catalytic system shows wide tolerance
Asymmetric Brønsted Acid Catalysis: Catalytic Enantioselective Synthesis of Highly Biologically Active Dihydroquinazolinones
作者:Magnus Rueping、Andrey P. Antonchick、Erli Sugiono、Konstantin Grenader
DOI:10.1002/anie.200804770
日期:2009.1.19
Surprisingly straightforward: A metal‐free, highly enantioselectiveBrønsted acid catalyzed condensation/addition reaction has been developed for the construction of 2,3‐dihydroquinazolinones starting from 2‐aminobenzamide and aldehydes (see scheme). This efficient approach provides 2,3‐dihydroquinazolinones with a strong preference for the S enantiomers, which have higher biological activities than
Boosting Enantioselectivity of Chiral Organocatalysts with Ultrathin Two-Dimensional Metal–Organic Framework Nanosheets
作者:Chunxia Tan、Kuiwei Yang、Jinqiao Dong、Yuhao Liu、Yan Liu、Jianwen Jiang、Yong Cui
DOI:10.1021/jacs.9b07633
日期:2019.11.6
surfaces of the flexible nanosheets. Moreover, the MOF crystals and nanosheets exhibit highly sensitive fluorescent enhancement in the presence of chiral amino alcohols with enantioselectivity factors being respectively increased up to 1.4 and 2.3 times of the values of the diols, allowing them to be utilized in chiral sensing. Therefore, the observed enantioselectivities increase in the order organocatalyst
METHODS OF DETERMINING BETA-III TUBULIN EXPRESSION
申请人:Brown L. Milton
公开号:US20070134161A1
公开(公告)日:2007-06-14
Provided are methods of determining the quantity and location of β
III
-tubulin expression in a subject, which may be used to determine the location and/or extent of excessive or uncontrolled growth of cells such as tumors. Such methods may include administering at least one compound to a patient and determining the quantity and location of β
III
tubulin expression within the patient by visualizing the compound within the patient. Visualization of the compound may be indicative of the binding of the compound to cells that are actively expressing β
III
tubulin.
DUAL SMALL MOLECULE INHIBITORS OF CANCER AND ANGIOGENESIS
申请人:Brown Milton L.
公开号:US20120202800A1
公开(公告)日:2012-08-09
The present invention provides analogs and derivatives of thalidomide which inhibit cancer and angiogenesis. The present invention further provides compounds which disrupt microtubule polymerization. The present further provides methods of treating cancers comprising mutant p53.