A mesoporous aluminosilicate (Al-MCM-41) was found to be an effective heterogeneous catalyst for the reaction of both aldehydes and acetals with silylenolethers or ketene silylacetals to give the corresponding aldol adducts in moderate to high yields. The remarkable high catalytic activity of Al-MCM-41 over amorphous silica-alumina and aluminum-free mesoporous silicate was observed in the reaction
A benzofuran-based cage-shaped borate showed a higher degree of Lewis acidity and exhibited photo-activated catalytic activity under black-light irradiation.
Polymer-supported PPh<sub>3</sub> as a reusable organocatalyst for the Mukaiyama aldol and Mannich reaction
作者:Satoru Matsukawa、Kazuki Fukazawa、Junya Kimura
DOI:10.1039/c4ra03394a
日期:——
An easily accessible and user-friendly polymer-supported phosphine PS-PPh3 catalyzes the aldol reaction of aldehydes and imines. A broad range of aldehydes and imines could be applied under mild conditions using 5–10 mol% PS-PPh3. PS-PPh3 was easily recovered and reused with minimal loss of activity.
Brønsted‐Acid‐Catalyzed One‐Pot Synthesis of β,β‐Diaryl Esters: Direct Regioselective Approach to Diverse Arrays of 3‐Aryl‐1‐indanone Cores
作者:Pragya Sharma、Neha Taneja、Sanjay Singh、Chinmoy K. Hazra
DOI:10.1002/chem.202202956
日期:2023.1.9
Three-component, solvent-dependent, Brønsted-acid-catalyzed reaction of benzaldehydes, silyl enolates and arene nucleophiles has been developed for the synthesis of potential drug candidate 3-aryl-1-indanones. This reaction features the formation of three C−C bonds, high regioselectivity in a one-pot strategy, broad substrate generality, facile scalability, high functional group tolerance and viable