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.
基于苯并呋喃的笼状硼酸盐显示出较高的路易斯酸度,并在黑光照射下表现出光活化的催化活性。
Quaternary Ammonium Dendrimers as Lewis Base Catalysts for Mukaiyama–Aldol Reaction
作者:Tomoo Mizugaki、Casey E. Hetrick、Makoto Murata、Kohki Ebitani、Michael D. Amiridis、Kiyotomi Kaneda
DOI:10.1246/cl.2005.420
日期:2005.3
Surface-alkylated poly(propylene imine) dendrimer was treated with methyl iodide to afford quaternarized ammonium iodide dendrimer. The quaternarized dendrimer catalyzed the Mukaiyama–Aldol reaction of trimethylsilyl acetal with various aldehydes as a Lewis base in apolar toluene solvent.
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