Regulation of Chiral Phosphoric Acid Catalyzed Asymmetric Reaction through Crown Ether Based Host–Guest Chemistry
作者:Jiadong Tang、Can Chen、Tao Hong、Zibin Zhang、Chunsong Xie、Shijun Li
DOI:10.1021/acs.orglett.2c03091
日期:2022.11.4
in-depth intersection of supramolecular chemistry and asymmetric catalysis due to its unique advantages in building chiral catalyst libraries and regulating performance of catalysts. Herein, we combine crown ether based host–guest chemistry with chiral phosphoricacidmediated asymmetric catalysis to actualize the supramolecular regulation of catalytic asymmetric two-component tandem acetalization
Highly Enantioselective Synthesis of Dihydroquinazolinones Catalyzed by SPINOL-Phosphoric Acids
作者:Dan Huang、Xuejian Li、Fangxi Xu、Luhang Li、Xufeng Lin
DOI:10.1021/cs400591u
日期:2013.10.4
The asymmetric condensation/amine addition cascade sequence of 2-aminobenzamides and aldehydes catalyzed by chiral spirocyclic SPINOL-phosphoric acids was realized. SPINOL-phosphoric acid 1j was found to be a general, highly enantioselective organocatalyst for such cascade reactions at room temperature, affording 2,3-dihydroquinazolinones in excellent yields (up to 99%) with good to excellent ee's (up to 98%). The best level of stereocontrol was obtained for aromatic aldehydes with an ortho substituent.
Highly Stable Zr(IV)-Based Metal–Organic Frameworks with Chiral Phosphoric Acids for Catalytic Asymmetric Tandem Reactions
作者:Wei Gong、Xu Chen、Hong Jiang、Dandan Chu、Yong Cui、Yan Liu
DOI:10.1021/jacs.9b02294
日期:2019.5.8
Heterogeneous Brønsted acid catalysts featuring high porosity, crystallinity, and stability have been of great interest for both fundamental studies and practical applications, but synthetically, they still face a formidable challenge. Here, we illustrated a ligand design strategy for directly installing chiral phosphoric acid catalysts into highly stable Zr-MOFs by sterically protecting them from coordinating