Author/Authors :
Varghese، نويسنده , , Shaji and Anand، نويسنده , , Chokkalinkam and Dhawale، نويسنده , , Dattatray and Mano، نويسنده , , Ajayan and Balasubramanian، نويسنده , , Veerappan V. and Raj، نويسنده , , George Allen Gnana and Nagarajan، نويسنده , , Samuthira and Wahab، نويسنده , , Mohammad A. and Vinu، نويسنده , , Ajayan، نويسنده ,
Abstract :
A novel mesoporous catalyst, CuAl-SBA-15, with a hexagonally ordered porous structure prepared via a soft-templating approach in a highly acidic medium is used for tandem C–C and C–O bond formation between phenols and allylic alcohols to afford a variety of dihydrobenzopyrans in good yields. The catalyst is also found to be highly active for the synthesis of vitamin E and can be recycled several times without significant loss of its activity.
Keywords :
Phenols , Tandem reactions , chromans , Heterogeneous catalyst , Mesoporous
